Unit 3 The seasons单元知识总结及重点易错专项训练2026-2027学年沪教版七年级英语上册

**基本信息** 聚焦单元核心语法与词汇，以10大易错考点为纲，通过基础-提升-拓展三级训练体系，系统强化There be句型、形容词用法等关键能力，培养语言理解与逻辑分析素养。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |10大重点易错考点|每考点9题（3基础+3提升+3拓展）|易错点归纳（如there be与have混淆）、语法规则应用（就近原则、非谓语搭配）|从词汇/句型基础到语境应用拓展，形成“概念-规则-变式”递进链条|

沪教版新版七年级上册 Unit 3 The seasons 单元知识总结及重点易错专项训练 ■ ■ ■ ■ ■ ■ ■ 说明：本练习紧扣最新教材精选 10 个重点易错考点，每个考点含基础题×3、提升题×3、拓展题×3，共 90 题。 一、单元重点总结 【重点单词】 season 季节；spring 春天；summer 夏天；autumn 秋天；winter 冬天；weather 天气；warm 温暖的；hot 炎热的；cool 凉爽的；cold 寒冷的；dry 干燥的；wet 潮湿的；clear 晴朗的；snowy 下雪的；sunny 晴朗的；bright 明亮的；noisy 喧闹的；peaceful 安静的；fresh 新鲜的；feature 特色；south 南方；thunder 雷；lightning 闪电；footprint 脚印；sandy 铺满沙子的；deep 深的；kick 踢；town 镇；gather 采集；snake 蛇；through 自始至终；part 区域；article 文章；reason 原因；alive 有生气的；divide 分开；decide 决定；crop 庄稼；culture 文化；local 当地的；tradition 传统；continue 持续 【重点短语】 have picnics 野餐；take a trip 去旅行；go on a family outing 全家远足；go hiking 去徒步；work one’s land 耕种土地；go to the beach 去海滩；in the countryside 在乡村；be full of 充满；be busy with 忙于；wake up 醒来；start / begin to do 开始做；come back from 从……回来；in fact 事实上；be divided into 被分成；be based on 基于；play an important part in 在……发挥重要作用；the importance of ……的重要性；prepare for 为……做准备；solar term 节气；fresh fruit 新鲜水果；at this time of year 在一年中的这个时候；play in the snow 在雪里玩 【重点句型】 1. There are four seasons in a year, and each season has its special features. 2. Spring is warm. / Summer is hot. / Winter is cold and snowy. 3. It is exciting to take a trip in the countryside in springtime. 4. It is nice to eat ice cream or fresh fruit in summer. 5. It is great to go on a family outing at this time of year. 6. Leaves turn brown, red or yellow and start falling from the trees. 7. Farmers are busy with the harvest. 8. In fact, the year is divided into 24 parts, based on where the sun is in the sky. 9. They help farmers decide when to plant their crops. 10. Birds come back from the south. 【重点语法】 1. There be 句型（就近原则）：There are four seasons... be 由最近名词决定。 2. 主语 + be + 形容词：描述季节 / 天气特征。 3. It is + adj. + to do sth.：It 作形式主语，真正主语是不定式（exciting / nice / great）。 4. 连系动词 turn + 颜色 / 形容词：表状态变化（Leaves turn yellow）。 5. start / begin to do / doing：开始做某事。 6. be busy with sth. / be busy doing sth.：忙于…… 7. be divided into / be based on：被动结构，意为“被分成 / 基于”。 8. decide to do / continue to do (doing) / prepare for：非谓语动词搭配。 9. play an important part in + n. / doing；the importance of + n.：名词与介词搭配。 10. come back from + 地点；through 介词（自始至终）：方位与介词用法。 二、10 大重点易错考点专项训练 考点一：There be 句型的就近原则与四季表达 本单元核心句型 “There are four seasons in a year, and each season has its special features.” There be 表示“有”，be 动词由最靠近的名词单复数决定（就近原则）。易错：there be 与 have 混淆；be 动词单复数选错；季节名词（spring / summer / autumn / winter）与特征词 feature 拼写。 基础题：（选择题） ◇（ ）1. —_____ four seasons in a year. A. There is B. There are C. There has D. There have ◇（ ）2. Each season has its special _____. A. feature B. features C. feather D. future ◇（ ）3. —What are the _____ of each season? —They are different. A. feature B. features C. reason D. reasons 提升题：（选择题） ▲（ ）1. There _____ a lot of _____ in spring, and the weather is warm. A. is; rain B. are; rains C. is; rains D. are; rain ▲（ ）2. There _____ some fresh fruit and ice cream on the table in summer. A. is B. are C. have D. has ▲（ ）3. —_____ there any snow in winter in Wuhan? —Yes, but not much. A. Is B. Are C. Do D. Does 拓展题：（选择题） ★（ ）1. There _____ four seasons in a year, and each _____ its special features. A. is; have B. are; has C. are; have D. is; has ★（ ）2. In the text, “There are four seasons in a year, and each season _____ its special features.” A. have B. has C. having D. to have ★（ ）3. Which sentence uses “There be” correctly? A. There have four seasons in a year. B. There is four seasons in a year. C. There are four seasons in a year. D. There are four season in a year. 考点二：主语 + be + 形容词 描述季节与天气特征（天气形容词辨析） 本单元用 “主语 + be + 形容词” 描述季节与天气，如 “Spring is warm.” “Summer is hot.” “Winter is cold and snowy.” 天气形容词：sunny（晴朗的）、cloudy（多云的）、rainy（下雨的）、windy（有风的）、snowy（下雪的）、wet（潮湿的）、clear（晴朗的）、dry（干燥的）。易错：天气与季节形容词搭配；-y 拼写；并列用 and。 基础题：（选择题） ◇（ ）1. Summer is _____ and the sun shines brightly. A. cold B. hot C. cool D. warm ◇（ ）2. Winter is cold and _____ in many places. A. snowy B. sunny C. windy D. cloudy ◇（ ）3. The weather is cool and _____ in autumn. A. wet B. dry C. snowy D. hot 提升题：（选择题） ▲（ ）1. —What’s the weather like today? —It’s _____ and the sun is in the clear, blue sky. A. rainy B. sunny C. windy D. snowy ▲（ ）2. In summer afternoons, there is often _____ and lightning. A. snow B. wind C. thunder D. frost ▲（ ）3. Spring is warm. The snow _____ and nature wakes up. A. melts B. melt C. melting D. melted 拓展题：（选择题） ★（ ）1. Which is NOT a weather adjective ending with “-y”? A. sunny B. cloudy C. rainy D. winter ★（ ）2. —Why do children love winter? —Because they love to play _____. A. in the snow B. in the rain C. in the sun D. in the wind ★（ ）3. “Autumn is beautiful and full of colour.” The word “beautiful” here is a(n) _____. A. noun B. verb C. adjective D. adverb 考点三：It is + adj. + to do sth. 句型（exciting / nice / great 辨析） 本单元 “It is exciting to take a trip in the countryside in springtime.” “It is nice to eat ice cream or fresh fruit in summer.” “It is great to go on a family outing at this time of year.” 结构：It is + 形容词 + to do，it 为形式主语，真正主语是不定式。易错：漏 to；修饰事用 -ing 形容词；it 不能换成人称代词。 基础题：（选择题） ◇（ ）1. It is exciting _____ a trip in the countryside in springtime. A. take B. to take C. taking D. takes ◇（ ）2. It is nice _____ ice cream or fresh fruit in summer. A. eat B. eating C. to eat D. eats ◇（ ）3. It is great _____ on a family outing at this time of year. A. go B. going C. to go D. goes 提升题：（选择题） ▲（ ）1. It is _____ to take a trip in the countryside in spring. A. excite B. excited C. exciting D. excitement ▲（ ）2. —_____ is nice to eat fresh fruit in summer. —I think so. A. This B. That C. It D. He ▲（ ）3. It is great to go on a family _____ at this time of year. A. outing B. outlet C. outside D. outgoing 拓展题：（选择题） ★（ ）1. Which sentence has the structure “It is + adj. + to do”? A. Spring is warm. B. It is exciting to take a trip. C. There are four seasons. D. Leaves turn yellow. ★（ ）2. It is _____ to go on a family outing at this time of year. A. great B. greatly C. greater D. greatest ★（ ）3. —What makes spring exciting? —_____ is exciting to take a trip in the countryside. A. This B. That C. It D. They 考点四：连系动词 turn + 颜色（表变化） 本单元 “Leaves turn brown, red or yellow and start falling from the trees.” turn 作连系动词，意为“变得”，后接颜色形容词（brown / red / yellow 等）或形容词，表状态变化。易错：turn 后颜色不加冠词；turn 与 become 混淆；颜色词拼写。 基础题：（选择题） ◇（ ）1. In autumn, leaves _____ brown, red or yellow. A. turn B. turns C. turning D. turned ◇（ ）2. Leaves turn brown, red or yellow and start _____ from the trees. A. fall B. to fall C. falling D. fell ◇（ ）3. The weather _____ cold in winter. A. turn B. turns C. turning D. turned 提升题：（选择题） ▲（ ）1. —What colour do leaves turn in autumn? —They turn _____. A. browns B. brown C. a brown D. the brown ▲（ ）2. The sky _____ dark before the thunder and lightning. A. turn B. turns C. turning D. to turn ▲（ ）3. Spring is warm and everything _____ green. A. turn B. turns C. turning D. turned 拓展题：（选择题） ★（ ）1. Which sentence uses “turn + colour” correctly? A. Leaves turn a red. B. Leaves turn red. C. Leaves turn the red. D. Leaves turning red. ★（ ）2. In the text, “Leaves turn brown, red _____ yellow.” A. and B. or C. but D. so ★（ ）3. The word “turn” in “Leaves turn yellow” is a _____. A. noun B. linking verb C. adjective D. adverb 考点五：start / begin to do 与 start / begin doing（开始做） 本单元 “Plants start to grow.” “Life begins again in spring.” start / begin 后接 to do 或 doing，意义相近。易错：start 三单 starts；begin 拼写；后接动词用 to do / doing 而非原形；again（再次）。 基础题：（选择题） ◇（ ）1. Plants start _____ in spring. A. grow B. to grow C. grew D. grows ◇（ ）2. Life _____ again in spring. A. begin B. begins C. beginning D. began ◇（ ）3. The snow melts, and nature _____ up after the long winter. A. wake B. wakes C. waking D. woke 提升题：（选择题） ▲（ ）1. After winter, warm rain falls and plants start _____. A. grow B. grew C. to grow D. grows ▲（ ）2. The sun _____ brightly in the clear, blue sky in summer. A. shine B. shines C. shining D. shone ▲（ ）3. Birds _____ back from the south in spring. A. come B. comes C. coming D. came 拓展题：（选择题） ★（ ）1. Which is WRONG? A. Plants start to grow. B. Plants start growing. C. Plants start grow. D. Life begins again. ★（ ）2. “Life begins again in spring.” The word “again” means _____. A. 第一次 B. 又一次/再次 C. 从不 D. 总是 ★（ ）3. Nature wakes up _____ the long winter. A. before B. after C. during D. in 考点六：be busy with sth. 与 be busy doing sth.（忙于） 本单元 “Farmers are busy with the harvest.” be busy with + 名词；也可 be busy doing sth. 忙于做某事。易错：with 后接名词而非动词原形；doing 用动名词；harvest（丰收）拼写；busy 后不接 to do。 基础题：（选择题） ◇（ ）1. Farmers are busy _____ the harvest in autumn. A. with B. in C. on D. at ◇（ ）2. Squirrels are busy _____ food for the cold winter. A. gather B. to gather C. gathering D. gathers ◇（ ）3. The farmers are busy with _____. A. harvest B. harvesting C. to harvest D. harvested 提升题：（选择题） ▲（ ）1. In autumn, farmers are busy _____ crops. A. harvest B. to harvest C. harvesting D. harvested ▲（ ）2. They are busy _____ their land in spring. A. work B. to work C. working D. works ▲（ ）3. The workers are busy _____ the new article. A. write B. to write C. writing D. wrote 拓展题：（选择题） ★（ ）1. Which is WRONG? A. Farmers are busy with the harvest. B. Farmers are busy harvesting. C. Farmers are busy to harvest. D. Farmers are busy with harvest. ★（ ）2. “Farmers are busy with the harvest.” The word “harvest” is a _____. A. verb B. noun C. adjective D. adverb ★（ ）3. Squirrels gather food and are busy _____ for winter. A. prepare B. to prepare C. preparing D. prepared 考点七：be divided into 与 be based on（被动结构） 本单元 “In fact, the year is divided into 24 parts, based on where the sun is in the sky.” be divided into 意为“被分成……”；be based on 意为“基于 / 根据……”。易错：divide 过去分词 divided；based on 中 based；into 与 on 介词搭配；24 solar terms（二十四节气）。 基础题：（选择题） ◇（ ）1. The year is divided _____ 24 parts. A. in B. into C. on D. at ◇（ ）2. The 24 solar _____ help farmers a lot. A. term B. terms C. termin D. termly ◇（ ）3. The year is based _____ where the sun is in the sky. A. in B. into C. on D. at 提升题：（选择题） ▲（ ）1. In fact, the year is divided into 24 _____, based on where the sun is. A. part B. parts C. party D. partition ▲（ ）2. The article is based _____ a true story about seasons. A. in B. on C. at D. into ▲（ ）3. China’s 24 solar terms play an important part _____ farming. A. in B. on C. at D. into 拓展题：（选择题） ★（ ）1. Which sentence is RIGHT? A. The year is divide into 24 parts. B. The year is divided into 24 parts. C. The year is divided in 24 parts. D. The year divided into 24 parts. ★（ ）2. “based on where the sun is in the sky” means the year is divided _____ the sun’s position. A. because of B. according to / based on C. instead of D. full of ★（ ）3. The word “divide” in “is divided into” is in the _____ form. A. present B. past C. past participle (过去分词) D. future 考点八：decide / continue / prepare 等非谓语搭配 本单元 “they help farmers decide when to plant their crops” “prepare for the cold winter”。decide to do sth. 决定做某事；continue to do / doing 继续做；prepare for 为……做准备；疑问词 + to do（when to plant）。易错：decide 后接 to do 而非 doing；疑问词 + to do；prepare for 后接名词。 基础题：（选择题） ◇（ ）1. They help farmers decide when _____ their crops. A. plant B. to plant C. planting D. plants ◇（ ）2. Chen Wei decides _____ a trip in spring. A. take B. to take C. taking D. takes ◇（ ）3. We should prepare _____ the cold winter. A. for B. to C. on D. at 提升题：（选择题） ▲（ ）1. The squirrels continue _____ food for winter. A. gather B. to gather C. gathered D. gathers ▲（ ）2. Lily decides _____ a family outing in autumn. A. go on B. to go on C. going on D. goes on ▲（ ）3. Farmers decide when _____ their crops based on solar terms. A. plant B. to plant C. planting D. plants 拓展题：（选择题） ★（ ）1. Which is WRONG? A. They decide to plant crops. B. They decide planting crops. C. They help farmers decide when to plant. D. They prepare for winter. ★（ ）2. “decide when to plant” has the structure “verb + _____”. A. 疑问词 + to do B. 动词原形 C. 过去式 D. 比较级 ★（ ）3. Winter continues and bears find warm places _____ through the winter. A. sleep B. to sleep C. sleeping D. slept 考点九：play an important part in 与 the importance of（名词/介词搭配） 本单元 “play an important part in 在……上发挥重要作用” “the importance of ……的重要性”。play an important part in + 名词 / 动名词；the importance of + 名词。易错：part 用 in 而非 on；importance 是名词（important 是形容词）；of 后接名词。 基础题：（选择题） ◇（ ）1. Solar terms play an important part _____ farming. A. on B. in C. at D. for ◇（ ）2. We should know the importance _____ China’s 24 solar terms. A. in B. on C. of D. at ◇（ ）3. The sun plays an important part _____ our seasons. A. on B. in C. at D. for 提升题：（选择题） ▲（ ）1. The 24 solar terms play an important part in _____ farmers. A. help B. to help C. helping D. helped ▲（ ）2. They tell us the importance _____ knowing the seasons. A. in B. on C. of D. at ▲（ ）3. Local culture and tradition play an important part _____ our lives. A. on B. in C. at D. for 拓展题：（选择题） ★（ ）1. Which is WRONG? A. play an important part in B. play an important part on C. the importance of D. an important part ★（ ）2. “the importance of” — the word “importance” is a(n) _____. A. adjective (important) B. noun C. verb D. adverb ★（ ）3. Solar terms play an important part in helping farmers decide when _____ crops. A. plant B. to plant C. planting D. plants 考点十：come back from + 地点 与 through 介词用法 本单元 “birds come back from the south” “Bears and snakes find warm places to sleep through the winter”。come back from 意为“从……回来”，from 后接地点（the south 南方）；through 作介词意为“自始至终 / 整个……期间”，如 sleep through the winter（整个冬天冬眠）。易错：from 后接地点；through 与 across / during 混淆；south 前加 the。 基础题：（选择题） ◇（ ）1. Birds come back from _____ in spring. A. north B. south C. east D. west ◇（ ）2. In the text, bears and snakes sleep _____ the winter. A. through B. across C. over D. above ◇（ ）3. After the summer trip, Olivia comes back from _____. A. Xiamen B. the Xiamen C. Xiamen’s D. to Xiamen 提升题：（选择题） ▲（ ）1. The birds fly to the north in autumn and come back from _____ in spring. A. the south B. south C. a south D. southern ▲（ ）2. Snakes sleep _____ the cold winter and wake up in spring. A. through B. across C. cross D. crossing ▲（ ）3. Chen Wei goes to Kunming and comes back from _____. A. Kunming B. the Kunming C. Kunming’s D. to Kunming 拓展题：（选择题） ★（ ）1. Which is WRONG? A. Birds come back from the south. B. Bears sleep through the winter. C. They come back from Wuhan. D. Snakes sleep across the winter. ★（ ）2. “sleep through the winter” — “through” here means _____. A. 穿过（从一边到另一边） B. 自始至终/整个……期间 C. 在……上面 D. 在……附近 ★（ ）3. Birds come back from the south, and the word “south” is a _____. A. verb B. noun C. adjective D. adverb 三、参考答案（唯一答案） 考点1：基础B 基础A 基础B 提升A 提升A 提升A 拓展B 拓展B 拓展C 考点2：基础B 基础A 基础B 提升B 提升C 提升A 拓展D 拓展A 拓展C 考点3：基础B 基础C 基础C 提升C 提升C 提升A 拓展B 拓展A 拓展C 考点4：基础A 基础C 基础B 提升B 提升B 提升B 拓展B 拓展B 拓展B 考点5：基础B 基础B 基础B 提升C 提升B 提升A 拓展C 拓展B 拓展B 考点6：基础A 基础C 基础A 提升C 提升C 提升C 拓展C 拓展B 拓展C 考点7：基础B 基础B 基础C 提升B 提升B 提升A 拓展B 拓展B 拓展C 考点8：基础B 基础B 基础A 提升B 提升B 提升B 拓展B 拓展A 拓展B 考点9：基础B 基础C 基础B 提升C 提升C 提升B 拓展B 拓展B 拓展B 考点10：基础B 基础A 基础A 提升A 提升A 提升A 拓展D 拓展B 拓展B 四、详细参考解析 考点1 【基础题】 1. There be 句型中 be 由主语决定，four seasons 为复数，用 are；there be 表示“有”，不能用 have / has。 2. each season 为单数，其“特色”用单数 feature；feather 是“羽毛”，future 是“未来”，均不符。 3. 问句 be 动词 are 提示主语用复数 features；问的是季节的“特征”而非“原因”。 【提升题】 1. a lot of rain 中 rain 不可数，谓语用单数 is；rain 不加 s。 2. 就近原则，最靠近 be 的是 some fresh fruit（fruit 不可数），用 is；there be 不与 have 连用。 3. snow 不可数名词，疑问句用 Is there；不能用 Do / Does。 【拓展题】 1. four seasons 复数用 are；each 作主语时视为单数，用 has。 2. each season 单数第三人称，谓语用 has；have 用于非三单。 3. C 正确使用了 There are + 复数名词；A 误用 have，B be 用错单数，D season 未用复数。 考点2 【基础题】 1. 夏天炎热，太阳明亮照耀，用 hot；cold / cool / warm 均不符夏季。 2. 原文“Winter is cold and snowy”，冬天寒冷多雪。 3. 原文“autumn... cool and dry”，秋天凉爽干燥。 【提升题】 1. 晴朗蓝天对应 sunny（晴朗的）；rainy / windy / snowy 不符。 2. 原文“often thunder and lightning”，夏天午后常有雷。 3. snow 为第三人称单数，谓语用 melts；主语 snow 非复数。 【拓展题】 1. winter 是名词（季节），不是以 -y 结尾的天气形容词；sunny / cloudy / rainy 都是。 2. 原文“Children love winter because they love to play in the snow.” 3. beautiful 修饰 season，是形容词；名词为 beauty，动词为 beautify。 考点3 【基础题】 1. It is + adj. + to do，exciting 后接不定式 to take。 2. nice 后接 to eat；it 作形式主语，不定式是真正主语。 3. great 后接 to go on a family outing。 【提升题】 1. 修饰事用 exciting（令人兴奋的）；excite 是动词，excited 修饰人，excitement 是名词。 2. 形式主语必须用 it，不能用人称代词 this / that / he。 3. 固定搭配 go on a family outing（家庭远足）；outlet 商店，outside 外面，outgoing 外向的，均不符。 【拓展题】 1. B 为 It is + adj. + to do 结构；其余分别为主系表、there be、主谓结构。 2. great 为原级形容词，修饰 to go on a family outing；greatly 是副词。 3. 形式主语 it，指代后面的 to take a trip。 考点4 【基础题】 1. leaves 复数，谓语用 turn；turn 在此为连系动词“变得”。 2. start doing sth. 开始做某事，用 falling。 3. weather 单数，谓语用 turns。 【提升题】 1. turn 后接颜色形容词不加冠词，直接用 brown。 2. sky 单数，谓语用 turns；天色变暗用 turn。 3. everything 视为单数，谓语用 turns。 【拓展题】 1. turn + 颜色，颜色前不加 a / the，直接用 red。 2. 原文“Leaves turn brown, red or yellow”，列举用 or。 3. turn 在此意为“变得”，是连系动词（linking verb）。 考点5 【基础题】 1. start to do / doing，用 to grow；不能接原形。 2. Life 单数，begin 三单 begins；again 意为“再次”。 3. nature 单数，wake 三单 wakes；after the long winter 为原文搭配。 【提升题】 1. start 后接 to grow（或 growing），不能用原形 grow。 2. sun 单数，shine 三单 shines。 3. birds 复数，come 用原形；come back from 从……回来。 【拓展题】 1. C 错误，start 后不能接动词原形；A / B 正确，D 正确。 2. again 意为“又一次 / 再次”。 3. 原文“nature wakes up after the long winter”，用 after。 考点6 【基础题】 1. be busy with + 名词，用 with the harvest。 2. be busy doing sth.，gather 用 gathering。 3. be busy with + 名词 harvest；harvest 此处为名词。 【提升题】 1. be busy doing，harvest 用 harvesting。 2. be busy doing，work 用 working；work one’s land 耕种土地。 3. be busy doing，write 用 writing；article 文章。 【拓展题】 1. C 错误，busy 后不接 to do；A / B / D 均正确。 2. harvest 此处为名词“丰收”；动词 harvest 也可，但句中与 the 连用为名词。 3. be busy doing，prepare 用 preparing。 考点7 【基础题】 1. be divided into 被分成，固定搭配 into。 2. 24 solar terms 二十四节气，term 用复数 terms。 3. be based on 基于，固定搭配 on。 【提升题】 1. 24 后接复数 parts；party 派对，partition 隔断，均不符。 2. be based on 基于，用 on。 3. play an important part in 在……发挥重要作用，用 in。 【拓展题】 1. B 正确：is divided（过去分词）+ into；A divide 未用分词，C 介词错 in，D 缺 be。 2. based on 意为“基于 / 根据”，对应 according to / based on。 3. is divided 中 divide 用过去分词 divided，构成被动语态。 考点8 【基础题】 1. 疑问词 + to do 结构，when to plant。 2. decide to do，用 to take a trip。 3. prepare for 为……做准备，固定搭配 for。 【提升题】 1. continue to do / doing，用 to gather。 2. decide to do，go on a family outing 用 to go on。 3. when to plant 疑问词 + 不定式。 【拓展题】 1. B 错误，decide 后接 to do 不接 doing；A / C / D 正确。 2. decide when to plant 结构为“动词 + 疑问词 + to do”。 3. find warm places to sleep，不定式 to sleep 表目的；原文“find warm places to sleep through the winter”。 考点9 【基础题】 1. play an important part in，用 in。 2. the importance of ……的重要性，用 of。 3. play an important part in，用 in。 【提升题】 1. in + 动名词 helping，play an important part in doing。 2. the importance of knowing，of 后接名词 / 动名词。 3. play an important part in，用 in。 【拓展题】 1. B 错误，应为 in 不是 on；A / C / D 正确。 2. importance 是名词（形容词为 important）。 3. when to plant 疑问词 + 不定式。 考点10 【基础题】 1. 原文“birds come back from the south”，春天从南方飞回。 2. 原文“sleep through the winter”，through 表示“整个……期间”。 3. come back from + 地名（不加 the），从厦门回来。 【提升题】 1. 与 the north 对应，用 the south（南方）。 2. sleep through the winter，through 整个冬天。 3. come back from + 地名 Kunming，不加 the。 【拓展题】 1. D 错误，应为 sleep through 不是 across；A / B / C 正确。 2. through 在此意为“自始至终 / 整个……期间”，非空间“穿过”。 3. south 此处为名词“南方”；southern 才是形容词。 学科网（北京）股份有限公司 $