Unit 4 Digital Life单元重点易错专项训练2026-2027学年外研版英语八年级上册

Unit 4 Digital Life · 单元重点易错专项训练 外研版（新版）八年级上册 Unit 4 Digital Life 单元重点易错专项训练 （9大考点 · 基础+提升+拓展 三层训练 · 附详细解析） ★ 考点一：现在完成时（have/has + done）基本用法与标志词 ★ ⚠ 易错速记：① 结构：have/has + 过去分词；② 标志词：already(肯定)/yet(疑问否定)/just/recently/ever/never/before/so far/up to now；③ 易错：already用于肯定句句中，yet用于句末；④ 瞬间动词vs延续动词（buy→have, borrow→keep, join→be in）；⑤ have been to(去过已回) vs have gone to(去了未回) ▷ 基础题（选择题） ▷（ ）1. Lily ______ already finished her online homework. A. have B. has C. is D. was ▷（ ）2. Jam hasn't checked his emails ______. A. already B. just C. yet D. ever ▷（ ）3. They ______ never seen such an amazing app before. A. have B. has C. are D. were ◇ 提升题（选择题） ◇（ ）1. Chen Wu ______ to Kunming twice to visit his aunt. A. has been B. has gone C. went D. goes ◇（ ）2. Zhang Hui ______ the new digital camera for two weeks. A. has bought B. bought C. has had D. buys ◇（ ）3. — Have you ______ heard of AI chatbots? — Yes, I use them every day. A. never B. ever C. just D. already ★ 拓展题（用适当形式填空） ★（ ）1. Jam ______ (not finish) reading the online article yet. ★（ ）2. Lily ______ (visit) the science museum in Jinan three times. ★（ ）3. They ______ (have) this laptop since last September. ★ 考点二：现在完成时 vs 一般过去时（时间状语辨析） ★ ⚠ 易错速记：① 现在完成时：强调对现在的影响/结果，无具体过去时间点；② 一般过去时：强调过去动作本身，有具体时间（yesterday/last week/in 2023/ago/just now）；③ 易错：just（完成时）vs just now（过去时）；④ for+时间段/since+时间点 必须用完成时且用延续动词 ▷ 基础题（选择题） ▷（ ）1. Jam ______ a new phone yesterday. A. buys B. has bought C. bought D. is buying ▷（ ）2. Lily ______ in this city since 2020. A. lives B. lived C. has lived D. is living ▷（ ）3. Chen Wu ______ the email just now. A. sends B. has sent C. sent D. is sending ◇ 提升题（选择题） ◇（ ）1. — ______ you ______ the film? — Yes, I saw it last weekend. A. Have; seen; have seen B. Did; see; have seen C. Have; seen; saw D. Did; see; saw ◇（ ）2. Zhou Ku ______ online for three hours. He should take a break. A. chats B. chatted C. has chatted D. is chatting ◇（ ）3. Jam ______ his password, so he can't log in ______. A. forgets; already B. has forgotten; yet C. forgot; yet D. has forgotten; just ★ 拓展题（用适当形式填空） ★（ ）1. Lily ______ (work) as a vlogger for two years. ★（ ）2. Chen Wu ______ (post) the video online just now. ★（ ）3. How long ______ you ______ (have) this tablet? ★ 考点三：被动语态（be + done）三种时态的被动 ★ ⚠ 易错速记：① 一般现在被动：am/is/are + done；② 一般过去被动：was/were + done；③ 现在完成被动：have/has been + done；④ 主动→被动步骤：宾语变主语→谓语变be+done→主语变by+宾语；⑤ 易错：双宾语动词（give/send/show/tell）有两个被动形式 ▷ 基础题（选择题） ▷（ ）1. English ______ as a foreign language in China. A. teaches B. is taught C. taught D. was taught ▷（ ）2. The email ______ by Jam yesterday morning. A. sends B. sent C. was sent D. is sent ▷（ ）3. The online order ______ already ______ by the shop. A. has; sent B. has; been sent C. have; sent D. was; sent ◇ 提升题（选择题） ◇（ ）1. A new app ______ by the students in our school next month. A. will develop B. will be developed C. develops D. is developed ◇（ ）2. Lily was ______ to download the file by her teacher. A. tell B. tells C. told D. telling ◇（ ）3. The problem ______ yet. A. hasn't solved B. hasn't been solved C. didn't solve D. wasn't solved ★ 拓展题（用适当形式填空） ★（ ）1. The message ______ (write) by Chen Wu yesterday. ★（ ）2. Digital cameras ______ (use) widely all over the world. ★（ ）3. The work ______ already ______ (finish) by them. ★ 考点四：情态动词（should/ought to/must/had better/can）辨析 ★ ⚠ 易错速记：① should = ought to 应该（ought to否定ought not to）；② must必须/一定（否定mustn't禁止）；③ had better do 最好做（否定had better not do）；④ can能/可以（否定can't不能/不可能）；⑤ 易错：must提问用needn't回答；shouldn't = 不应该 ▷ 基础题（选择题） ▷（ ）1. You ______ spend too much time on your phone. It's bad for your eyes. A. should B. shouldn't C. must D. had better ▷（ ）2. Jam ______ hand in his online project today. It's the deadline. A. should B. can C. must D. had better not ▷（ ）3. You'd better ______ late for the online meeting. A. not be B. don't be C. not to be D. being ◇ 提升题（选择题） ◇（ ）1. — Must I turn off the computer now? — No, you ______. A. mustn't B. can't C. needn't D. shouldn't ◇（ ）2. Lily ______ to practise speaking English every day. A. should B. ought C. ought to D. must to ◇（ ）3. You ______ take this app seriously. It can really help you study. A. had better B. had better not C. shouldn't D. can't ★ 拓展题（用适当形式填空） ★（ ）1. You ______ (should) eat too much fast food. It's unhealthy. ★（ ）2. Lily ______ (ought) to check her emails more often. ★（ ）3. You'd better ______ (turn) off the Wi-Fi when you sleep. ★ 考点五：if条件状语从句（主将从现/主祈从现/主情从现） ★ ⚠ 易错速记：① 主将从现：If it rains, I will stay home.（从句一般现在时，主句将来时）；② 主祈从现：If you want help, please call me.（从句现在时，主句祈使句）；③ 主情从现：If you feel tired, you should rest.（从句现在时，主句情态动词）；④ 易错：if从句用一般现在时表将来，绝不用will ▷ 基础题（选择题） ▷（ ）1. If it ______ tomorrow, we will stay at home. A. will rain B. rains C. rained D. is raining ▷（ ）2. If you ______ tired, you should take a break. A. will feel B. feel C. felt D. are feeling ▷（ ）3. If Jam ______ time, he will help you fix the computer. A. has B. will have C. had D. is having ◇ 提升题（选择题） ◇（ ）1. Please call me if you ______ any problems with the software. A. will have B. have C. had D. are having ◇（ ）2. If Lily ______ harder, she will pass the digital skills test. A. study B. studies C. will study D. studied ◇（ ）3. You won't be able to watch the video if you ______ the app. A. don't download B. won't download C. didn't download D. aren't downloading ★ 拓展题（用适当形式填空） ★（ ）1. If it ______ (rain) tomorrow, the picnic will be cancelled. ★（ ）2. You should restart the computer if it ______ (not work) properly. ★（ ）3. If Chen Wu ______ (have) enough money, he will buy a new tablet. ★ 考点六：核心短语辨析（depend on/take part in/pay for/set up/keep...away from） ★ ⚠ 易错速记：① depend on 依赖/取决于（on不可省）；② take part in 参加（= join in，后接活动）；③ pay for 为…付款（pay+钱+for+物）；④ set up 建立/创办/安装；⑤ keep...away from 使…远离；⑥ be interested in 对…感兴趣 ▷ 基础题（选择题） ▷（ ）1. Whether we go hiking ______ the weather. A. depends B. depends on C. depend on D. depending ▷（ ）2. Lily wants to ______ the online English speech contest. A. join B. take part C. take part in D. attend to ▷（ ）3. Jam ______ 200 yuan ______ the new keyboard. A. paid; on B. paid; for C. cost; for D. spent; for ◇ 提升题（选择题） ◇（ ）1. A new digital library ______ in our school next term. A. will set up B. will be set up C. sets up D. is set up ◇（ ）2. Parents should keep their kids ______ too much screen time. A. away from B. from away C. out of D. off from ◇（ ）3. Zhang Hui is very ______ learning how to code. A. interesting in B. interested in C. interested at D. interesting at ★ 拓展题（用适当形式填空） ★（ ）1. Good communication ______ (depend) on clear messages. ★（ ）2. They ______ (take) part in the online competition last month. ★（ ）3. How much did you pay ______ (介词) the headphones? ★ 考点七：形容词比较级与最高级（含more/less/most/least） ★ ⚠ 易错速记：① 规则变化：-er/-est（短词）；more/most + 原级（长词）；② 不规则：good/well→better→best, bad→worse→worst, far→farther/further；③ less + 原级 = 更不…；④ 最高级前必须加the；⑤ 比较级+than；as+原级+as 和…一样 ▷ 基础题（选择题） ▷（ ）1. This app is ______ than that one. I like it more. A. good B. better C. best D. the best ▷（ ）2. Jam's computer is the ______ in our class. A. fast B. faster C. fastest D. most fast ▷（ ）3. Online shopping is becoming ______ popular these days. A. more and more B. many and many C. much and much D. most and most ◇ 提升题（选择题） ◇（ ）1. The ______ you use your phone, the ______ your eyes will be. A. more; worse B. much; bad C. more; bad D. most; worst ◇（ ）2. This is one of ______ apps I have ever used. A. the most useful B. most useful C. the more useful D. more useful ◇（ ）3. Lily types as ______ as her brother. A. fast B. faster C. fastest D. more fast ★ 拓展题（用适当形式填空） ★（ ）1. AI is getting ______ and ______ (powerful) every year. ★（ ）2. This is the ______ (bad) internet connection I've ever had. ★（ ）3. Chen Wu is ______ (good) at coding than Zhou Ku. ★ 考点八：too...to / enough to / so...that 句型转换 ★ ⚠ 易错速记：① too + adj. + to do 太…而不能（否定含义）；② adj. + enough to do 足够…能做（肯定含义）；③ so + adj. + that从句 如此…以至于；④ 三者可互相转换：too young to = not old enough to = so young that...can't；⑤ 易错：enough放形容词/副词后 ▷ 基础题（选择题） ▷（ ）1. Jam is too young ______ a social media account. A. have B. to have C. having D. has ▷（ ）2. Lily is old enough ______ her own phone. A. use B. to use C. using D. used ▷（ ）3. The app is ______ popular ______ everyone wants to download it. A. too; to B. enough; to C. so; that D. such; that ◇ 提升题（选择题） ◇（ ）1. The file is too large ______ by email. A. send B. to send C. sending D. sent ◇（ ）2. Chen Wu is ______ a good programmer ______ he won the competition. A. so; that B. such; that C. too; to D. enough; to ◇（ ）3. Zhou Ku is not careful ______ to avoid mistakes. A. too B. enough C. so D. very ★ 拓展题（用适当形式填空） ★（ ）1. The password is too ______ (complex) to remember. ★（ ）2. She is ______ (luck) enough to get the first prize. ★（ ）3. The game is so ______ (addict) that kids can't stop playing. ★ 考点九：不定代词（something/anything/nothing）与反义疑问句/祈使句/交际 ★ ⚠ 易错速记：① something某物（肯定句）；anything任何物（疑问/否定）；nothing没有物=not anything；② 反义疑问：前肯后否，前否后肯；③ 祈使句：动词原形开头（Don't.../Please.../Let's...）；④ 易错：something用于表请求/建议的疑问句；nobody作主语谓语单数 ▷ 基础题（选择题） ▷（ ）1. I have ______ important to tell you about the project. A. anything B. something C. nothing D. everything ▷（ ）2. There is ______ wrong with my phone. It won't turn on. A. something B. anything C. nothing D. everything ▷（ ）3. Don't spend too much time online, ______ you? A. do B. don't C. will D. won't ◇ 提升题（选择题） ◇（ ）1. — Would you like ______ to drink? — No, thanks. I have ______. A. something; anything B. anything; something C. something; nothing D. anything; nothing ◇（ ）2. Let's download this app, ______? A. shall we B. will you C. do we D. don't we ◇（ ）3. Nobody in the class ______ how to fix the printer, ______? A. knows; do they B. know; don't they C. knows; don't they D. knows; do they ★ 拓展题（用适当形式填空） ★（ ）1. There is ______ (something/nothing) interesting on TV tonight. Let's play online games instead. ★（ ）2. ______ (not waste) too much time on social media. ★（ ）3. Everyone ______ (be) here now. Let's start the online meeting. U0001F4D6 参考答案与详细解析 ◎考点一：现在完成时基本用法与标志词 【基础题】 1. Lily ______ already finished her online homework. 答案：B。解析：Lily第三人称单数用has。already是现在完成时标志词，结构have/has + done。finished是过去分词。 2. Jam hasn't checked his emails ______. 答案：C。解析：yet用于否定句句末，是现在完成时标志。already用于肯定句句中。 3. They ______ never seen such an amazing app. 答案：A。解析：they复数用have。never是现在完成时标志，have never + done。 【提升题】 1. Chen Wu ______ to Kunming twice. 答案：A。解析：have been to 去过已回。twice两次说明已回来。have gone to去了未回（人不在）。 2. Zhang Hui ______ the new camera for two weeks. 答案：C。解析：for two weeks是时间段，用延续动词have的现在完成时has had。buy是瞬间动词不能接时间段。 3. Have you ______ heard of AI chatbots? 答案：B。解析：ever曾经，用于疑问句，现在完成时。never从未（否定），just刚刚，already已经（肯定句）。 【拓展题】 1. Jam ______ (not finish) reading yet. 答案：hasn't finished。解析：yet用现在完成时否定，Jam单数用hasn't finished。 2. Lily ______ (visit) the museum three times. 答案：has visited。解析：three times用现在完成时，Lily单数用has visited。 3. They ______ (have) this laptop since Sept. 答案：have had。解析：since+时间点用现在完成时，have的过去分词had（同形）。 ◎考点二：现在完成时 vs 一般过去时 【基础题】 1. Jam ______ a new phone yesterday. 答案：C。解析：yesterday是一般过去时标志，buy的过去式bought。 2. Lily ______ in this city since 2020. 答案：C。解析：since 2020用现在完成时，Lily单数用has lived。live是延续动词。 3. Chen Wu ______ the email just now. 答案：C。解析：just now刚才（不是just），用一般过去时sent。 【提升题】 1. — ______ you ______ the film? — Yes, I saw it. 答案：C。解析：问句用现在完成时Have you seen（强调对现在的影响），答句saw it last weekend用一般过去时。 2. Zhou Ku ______ online for three hours. 答案：C。解析：for three hours用现在完成时has chatted。chat双写t加ed。 3. Jam ______ his password, so he can't log in ______. 答案：B。解析：现在完成时has forgotten强调对现在的影响（不能登录）。yet用于否定句末。 【拓展题】 1. Lily ______ (work) as a vlogger for two years. 答案：has worked。解析：for two years用现在完成时，Lily单数用has worked。 2. Chen Wu ______ (post) the video just now. 答案：posted。解析：just now用一般过去时，post的过去式posted。 3. How long ______ you ______ (have) this tablet? 答案：have; had。解析：how long+have/has done，have的过去分词had。 ◎考点三：被动语态三种时态 【基础题】 1. English ______ as a foreign language in China. 答案：B。解析：客观事实用一般现在时，被动be+done。English单数用is taught。 2. The email ______ by Jam yesterday. 答案：C。解析：yesterday用一般过去时被动，email单数用was sent。 3. The online order ______ already ______. 答案：B。解析：already用现在完成时被动has been sent。order单数用has。 【提升题】 1. A new app ______ by the students next month. 答案：B。解析：next month将来时，被动用will be developed。by the students提示被动。 2. Lily was ______ to download the file. 答案：C。解析：被动语态be+told。tell的过去分词told。was told被告诉。 3. The problem ______ yet. 答案：B。解析：yet用现在完成时否定，被动hasn't been solved。solve的过去分词solved。 【拓展题】 1. The message ______ (write) by Chen Wu. 答案：was written。解析：yesterday用一般过去时被动，message单数用was written。 2. Digital cameras ______ (use) widely. 答案：are used。解析：客观事实用一般现在时被动，cameras复数用are used。 3. The work ______ already ______ (finish). 答案：has been finished。解析：already用现在完成时被动，work不可数用has been finished。 ◎考点四：情态动词辨析 【基础题】 1. You ______ spend too much time on your phone. 答案：B。解析：不应该花太多时间，shouldn't = should not。对健康有害用shouldn't。 2. Jam ______ hand in his project today. 答案：C。解析：deadline截止日期，必须用must（必须）。should应该语气太弱。 3. You'd better ______ late for the meeting. 答案：A。解析：had better not do 最好不要做。be late用动词原形be。 【提升题】 1. — Must I turn off now? — No, you ______. 答案：C。解析：must提问的否定回答用needn't（不必）或don't have to。mustn't是禁止。 2. Lily ______ to practise every day. 答案：C。解析：ought to do 应该做。ought to后接动词原形practise。 3. You ______ take this app seriously. 答案：A。解析：had better do 最好做。这个app真的能帮你学习。 【拓展题】 1. You ______ (should) eat too much fast food. 答案：shouldn't。解析：should的否定shouldn't。快餐不健康不应该多吃。 2. Lily ______ (ought) to check her emails. 答案：ought。解析：ought to do 应该做。ought to check应该检查。 3. You'd better ______ (turn) off Wi-Fi. 答案：turn。解析：had better do 最好做，后接动词原形turn。 ◎考点五：if条件状语从句（主将从现） 【基础题】 1. If it ______ tomorrow, we will stay home. 答案：B。解析：if从句用一般现在时表将来，it单数用rains。主句用will stay。 2. If you ______ tired, you should take a break. 答案：B。解析：主情从现，if从句用一般现在时feel。should是情态动词。 3. If Jam ______ time, he will help you. 答案：A。解析：if从句一般现在时，Jam单数用has。主句用will help。 【提升题】 1. Please call me if you ______ any problems. 答案：B。解析：主祈从现，if从句一般现在时have。please call是祈使句。 2. If Lily ______ harder, she will pass. 答案：B。解析：if从句一般现在时，Lily单数用studies。主句用will pass。 3. You won't watch the video if you ______ the app. 答案：A。解析：if从句一般现在时否定don't download。主句用won't be able to。 【拓展题】 1. If it ______ (rain) tomorrow, the picnic will be cancelled. 答案：rains。解析：if从句一般现在时表将来，it单数用rains。 2. You should restart if it ______ (not work). 答案：doesn't work。解析：if从句一般现在时否定，it单数用doesn't work。 3. If Chen Wu ______ (have) enough money. 答案：has。解析：if从句一般现在时，Chen Wu单数用has。 ◎考点六：核心短语辨析 【基础题】 1. Whether we go hiking ______ the weather. 答案：B。解析：depend on 取决于。Whether...depends on取决于。on不可省略。 2. Lily wants to ______ the online contest. 答案：C。解析：take part in 参加（后接活动）。contest是活动用take part in。 3. Jam ______ 200 yuan ______ the keyboard. 答案：B。解析：pay+钱+for+物。pay for为…付款。keyboard是物。 【提升题】 1. A new digital library ______ in our school. 答案：B。解析：next term将来时，被动will be set up。library被建立。 2. Parents should keep kids ______ too much screen time. 答案：A。解析：keep...away from 使…远离。远离过多屏幕时间。 3. Zhang Hui is very ______ learning to code. 答案：B。解析：be interested in 对…感兴趣。in后接名词/动名词。 【拓展题】 1. Good communication ______ (depend) on clear messages. 答案：depends。解析：depend on 取决于。communication单数用depends。 2. They ______ (take) part in the competition. 答案：took。解析：last month用一般过去时，take的过去式took。 3. How much did you pay ______ (介词) the headphones? 答案：for。解析：pay for 为…付款。固定搭配用for。 ◎考点七：比较级与最高级 【基础题】 1. This app is ______ than that one. 答案：B。解析：than提示比较级，good的比较级是better。 2. Jam's computer is the ______ in our class. 答案：C。解析：the+最高级，fast的最高级fastest。the fastest。 3. Online shopping is becoming ______ popular. 答案：A。解析：more and more + 原级 = 越来越…。more and more popular。 【提升题】 1. The ______ you use your phone, the ______ your eyes. 答案：A。解析：the+比较级, the+比较级。much→more, bad→worse。 2. This is one of ______ apps I have used. 答案：A。解析：one of + the + 最高级 + 复数名词。the most useful最有用的之一。 3. Lily types as ______ as her brother. 答案：A。解析：as+原级+as 和…一样。fast原级不变。 【拓展题】 1. AI is getting ______ and ______ (powerful). 答案：more; more powerful。解析：more and more + 原级 = 越来越…。powerful多音节用more。 2. This is the ______ (bad) connection. 答案：worst。解析：bad的最高级worst。the worst connection。 3. Chen Wu is ______ (good) at coding than Zhou Ku. 答案：better。解析：good at 擅长。比较级better at。than提示比较级。 ◎考点八：too...to / enough to / so...that 【基础题】 1. Jam is too young ______ a social media account. 答案：B。解析：too + adj. + to do 太…而不能。too young to have太年轻不能有。 2. Lily is old enough ______ her own phone. 答案：B。解析：adj. + enough to do 足够…能做。old enough to use足够大能使用。 3. The app is ______ popular ______ everyone wants it. 答案：C。解析：so + adj. + that从句 如此…以至于。so popular that如此流行以至于。 【提升题】 1. The file is too large ______ by email. 答案：B。解析：too + adj. + to do。too large to send太大不能发送。 2. Chen Wu is ______ a good programmer ______ he won. 答案：A。解析：so + adj. + that 如此…以至于。so good that如此好以至于。 3. Zhou Ku is not careful ______ to avoid mistakes. 答案：B。解析：adj. + enough to do。careful enough to avoid足够小心能避免。 【拓展题】 1. The password is too ______ (complex) to remember. 答案：complex。解析：too + adj. + to do。complex是形容词原级。 2. She is ______ (luck) enough to get first prize. 答案：lucky。解析：adj. + enough to do。luck的形容词lucky。enough放形容词后。 3. The game is so ______ (addict) that kids can't stop. 答案：addictive。解析：so + adj. + that。addict的形容词addictive（令人上瘾的）。 ◎考点九：不定代词与反义疑问/祈使/交际 【基础题】 1. I have ______ important to tell you. 答案：B。解析：肯定句用something。important是形容词修饰something放在后面。 2. There is ______ wrong with my phone. 答案：A。解析：肯定句用something。something wrong with...某物出了问题。 3. Don't spend too much time online, ______ you? 答案：C。解析：祈使句否定Don't...的反义疑问用will you。 【提升题】 1. — Would you like ______ to drink? — I have ______. 答案：C。解析：表邀请的疑问句用something（不用anything）。have nothing没有什么（不用anything）。 2. Let's download this app, ______? 答案：A。解析：Let's...的反义疑问用shall we。Let us...才用will you。 3. Nobody ______ how to fix it, ______? 答案：D。解析：nobody作主语谓语单数knows。前否(nobody)后肯，用do they(nobody对应they)。 【拓展题】 1. There is ______ (nothing) interesting. Let's play online. 答案：nothing。解析：nothing interesting没趣的事。形容词修饰nothing放在后面。 2. ______ (not waste) too much time on social media. 答案：Don't waste。解析：祈使句否定用Don't + 动词原形。waste是动词原形。 3. Everyone ______ (be) here now. 答案：is。解析：everyone作主语谓语用单数is。everyone is here大家都在这里。 — 练习结束，祝学习进步！ — 第 页 学科网（北京）股份有限公司 $