Unit3 语法及习题：现在进行时、Will_won't、Have to 2025-2026学年北师大版七年级英语下册

北师大版英语七下Unit3语法讲解及习题 现在进行时、Will/won't、Have to 一、现在进行时（Present continuous） （一）核心用法 用于描述此刻正在进行的动作，或现阶段正在进行的活动。 （二）句子结构 句型 结构 例句 肯定句 主语 + am/is/are + v-ing Some kids are building snowmen. 否定句 主语 + am/is/are + not + v-ing People aren't staying at home! 疑问句 Am/Is/Are + 主语 + v-ing? Are people walking in the rain? （三）动词-ing 变化规则 1. 一般直接加 -ing：work → working, play → playing 2. 以不发音的 e 结尾，去 e 加 -ing：make → making, take → taking 3. 重读闭音节，双写末尾辅音字母加 -ing：run → running, stop → stopping 4. 以 ie 结尾，变 ie 为 y 加 -ing：lie → lying, die → dying （四）常见时间状语 now, right now, at the moment, look!, listen! 二、Will / won't（一般将来时） （一）核心用法 用于表达对将来的预测、意愿、决定或承诺。 （二）句子结构 句型 结构 例句 肯定句 主语 + will + 动词原形 It will be wet and rainy. 否定句 主语 + won't (will not) + 动词原形 You won't need a coat. 疑问句 Will + 主语 + 动词原形? Will the weather be fine? （三）常见时间状语 tomorrow, next week, in the future, soon, this weekend 三、Have to（不得不） （一）核心用法 用于表达客观上的必要性，即“不得不”做某事，强调是外界条件或规则要求的。 （二）句子结构 句型 结构 例句 肯定句 主语 + have/has to + 动词原形 Schools sometimes have to close. 否定句 主语 + don't/doesn't have to + 动词原形 You don't have to go now. 疑问句 Do/Does + 主语 + have to + 动词原形? Do you have to leave early? （三）与 must 的区别 · have to：强调客观需要，有人称和时态变化。 · must：强调主观意愿或命令，无人称变化。 三、练习题 （一）单项选择 1. Look! Some kids ___________ snowmen. A. build B. are building C. built 2. It ___________ wet and rainy in Cairo tomorrow. A. will be B. is C. was 3. In thick fog, people ___________ close the highway. A. have to B. has to C. had to 4. —What are you doing now? —I ___________ my homework. A. do B. did C. am doing 5. You ___________ need a heavy coat in summer. A. will B. won't C. are 6. She ___________ to change her travel plan because of the storm. A. have B. has C. has to 7. Listen! The birds ___________ in the tree. A. sing B. are singing C. sang 8. ___________ you come to my party this weekend? A. Will B. Do C. Are 9. We don't ___________ wear a uniform at home. A. have to B. has to C. must 10. What ___________ people ___________ in the rain right now? A. are; doing B. do; do C. will; do （二）用所给词的适当形式填空 1. Look! The children ___________ (play) football in the rain. 2. It ___________ (not be) sunny tomorrow. 3. In big storms, travellers ___________ (have to) change their plans. 4. What ___________ you ___________ (do) at the moment? 5. I think it ___________ (rain) later. 6. She ___________ (not have to) get up early on Sundays. 7. Listen! Someone ___________ (knock) at the door. 8. ___________ you ___________ (come) to the picnic with us? 9. We ___________ (have to) finish the work today. 10. The weather ___________ (get) warmer and warmer now. （三）句型转换 1. They are enjoying themselves.（改为否定句） They ___________ ___________ themselves. 2. It will be sunny tomorrow.（改为一般疑问句） ___________ it ___________ sunny tomorrow? 3. Schools have to close.（对划线部分提问） ___________ ___________ schools have to ___________? 4. He is reading a book.（对划线部分提问） ___________ ___________ he ___________? 5. We will have a picnic this weekend.（改为否定句） We ___________ ___________ a picnic this weekend. 6. I have to wear a coat.（改为一般疑问句） ___________ you ___________ to wear a coat? 7. Are they watching TV?（作肯定回答） Yes, ___________ ___________. 8. Will you go to the park?（作否定回答） No, ___________ ___________. 9. He has to stay at home.（改为否定句） He ___________ ___________ to stay at home. 10. The students are cleaning the classroom.（对划线部分提问） ___________ ___________ the students ___________? （四）根据汉语完成句子 1. 看！他们正在堆雪人。 Look! They ___________ ___________ snowmen. 2. 明天天气会怎么样？ What ___________ the weather ___________ ___________ tomorrow? 3. 在大雾天，人们不得不关闭高速公路。 In thick fog, people ___________ ___________ close the highway. 4. 我今晚不打算看电视。 I ___________ ___________ TV tonight. 5. 你现在在做什么？ What ___________ you ___________ now? 四、答案 + 详细解析 （一）单项选择 1. B 解析：Look! 是现在进行时的标志，结构为 be + v-ing。 2. A 解析：tomorrow 是将来时的标志，用 will be。 3. A 解析：people 是复数，用 have to。 4. C 解析：now 是现在进行时的标志，I 后面用 am doing。 5. B 解析：夏天不需要厚外套，用 won't。 6. C 解析：she 是第三人称单数，用 has to。 7. B 解析：Listen! 是现在进行时的标志。 8. A 解析：this weekend 是将来时的标志，用 Will。 9. A 解析：don't 后面接 have to。 10. A 解析：right now 是现在进行时的标志。 （二）用所给词的适当形式填空 1. are playing 2. won't be / will not be 3. have to 4. are; doing 5. will rain / is going to rain 6. doesn't have to 7. is knocking 8. Will; come 9. have to 10. is getting （三）句型转换 1. aren't enjoying 2. Will; be 3. What do; do 4. What is; doing 5. won't have / will not have 6. Do; have 7. they are 8. I won't / we won't 9. doesn't have 10. What are; doing （四）根据汉语完成句子 1. are building 2. will; be like 3. have to 4. won't watch / am not going to watch 5. are; doing ( 1 ) 学科网（北京）股份有限公司 $