Unit 6 单元语法练习 2026-2027学年外研版英语八年级上册

该初中英语导学案围绕外研版八年级上册Unit 6语法展开，核心知识点为时间状语从句（when, while等连词）和条件状语从句（if, unless），通过表格对比连词含义与例句，结合“主将从现”原则及时态搭配，搭建学习支架，帮助学生衔接已学时态与从句规则。 资料题型丰富，涵盖填空、选择、句型转换及短文填空，参考答案附详细解析，助力学生掌握语法规则。通过多样化练习提升语言能力，分析时态搭配培养思维品质，自主练习设计促进学习能力发展，符合新课标核心素养要求。

外研版(新教材)八年级上册 语法练习 Unit 6 When disaster strikes 语法知识回顾 一、时间状语从句(Adverbial clauses of time) 用 when, while, as, before, after, until, as soon as, since 等连词引导,表示主句动作发生的时间。 连词 含义 例句 when 当……时(可指时间点/时间段) I was reading when the phone rang. while 当……时(强调时间段,从句常用进行时) While I was sleeping, the earthquake happened. as 一边……一边……;随着 He sang as he walked. before 在……之前 Turn off the gas before you leave. after 在……之后 We went home after the rain stopped. until 直到……为止 Stay here until I come back. as soon as 一……就…… I’ll call you as soon as I arrive. since 自从……以来 I have lived here since I was born. ️ 主将从现原则:在时间状语从句中,如果主句是一般将来时(或表示将来含义),从句用一般现在时表将来。 I will call you when I will arrive. I will call you when I arrive. 二、条件状语从句(Adverbial clauses of condition) 用 if, unless 等连词引导,表示主句动作发生的条件。 连词 含义 例句 if 如果 If it rains, we will stay at home. unless 如果不;除非(= if not) You will fail unless you work hard. ️ 同样遵循“主将从现”原则:条件状语从句中用一般现在时表将来。 If you will study hard, you will pass. If you study hard, you will pass. 三、重要时态搭配 主句时态 从句时态 例句 一般将来时(will) 一般现在时(主将从现) I will tell him if he comes. 现在完成时 since + 一般过去时 I have known him since he was a child. 过去进行时 when + 一般过去时 I was sleeping when the earthquake happened. 一般过去时 一般过去时(先后顺序) I turned off the gas after I finished cooking. 一、用所给词的正确形式填空(注意“主将从现”) 1. If it (rain) tomorrow, we will cancel the outdoor activity. 2. I will call you as soon as I (arrive) at the airport. 3. She won’t leave until her mother (come) back. 4. If you (not study) hard, you will fail the exam. 5. We will have a picnic if it (be) sunny this weekend. 6. Please turn off the lights before you (go) out. 7. He will help us if he (have) time. 8. I will tell her the news when she (return) home. 9. You will get lost unless you (take) a map with you. 10. She will practice the piano after she (finish) her homework. 二、用所给词的正确形式填空(注意时态搭配) 1. While I (read) a book, my phone suddenly rang. 2. When the earthquake (happen), I was sleeping. 3. She (cook) dinner when the power went out. 4. We (leave) the building after the alarm (sound). 5. He (live) in this city since he (graduate) from university. 6. I (wait) for the bus when it started to rain heavily. 7. She (not leave) until she (finish) her work. 8. As soon as the teacher (come) in, all the students stopped talking. 9. They (know) each other since they (be) children. 10. We (stay) at home because it (rain) outside when we woke up. 1. 三、用适当的连词填空(when, while, as, before, after, until, as soon as, since, if, unless) 1. I was doing my homework the light went out. 2. I was walking to school, I met my old friend. 3. Please wait here I come back. 4. She has worked at this hospital she left university. 5. it rains tomorrow, we will stay at home. 6. You won’t pass the exam you study hard. 7. I will tell him the news I see him. 8. He turned off the TV he went to bed. 9. she finished her homework, she went out to play. 10. The phone rang I was taking a shower. 四、单项选择 1. If it tomorrow, we will stay at home. A. will rain B. rains C. rained D. is raining 2. I will call you as soon as I to London. A. get B. will get C. got D. am getting 3. She until her mother back. A. will leave; comes B. won’t leave; comes C. won’t leave; will come D. leaves; will come 4. I was reading, my brother was watching TV. A. When B. While C. As soon as D. Until 5. We each other since we in primary school. A. know; are B. have known; were C. knew; were D. have known; are 6. it rains, we will still go to the park. A. Unless B. If C. Although D. Because 7. You will miss the bus you hurry up. A. if B. unless C. after D. while 8. Please turn off the gas you leave the kitchen. A. before B. after C. while D. as soon as 9. I dinner when the doorbell . A. had; rang B. was having; rang C. had; was ringing D. was having; was ringing 10. He in Shanghai since he born. A. lives; is B. lived; was C. has lived; was D. has lived; is 五、句型转换(合并句子,用所给连词) 1. I will finish my homework. I will go out to play.(用 after 合并) I will go out to play I my homework. 2. You work hard. You will succeed.(用 if 合并) you hard, you will succeed. 3. The rain stopped. We went out for a walk.(用 after 合并) We went out for a walk the rain . 4. She arrived home. She called me immediately.(用 as soon as 合并) She called me she arrived home. 5. He was watching TV. His father came in.(用 when 合并) He TV his father came in. 6. You don’t hurry up. You will be late.(用 unless 合并) You will be late you up. 7. She was cooking. I was cleaning the room.(用 while 合并) she cooking, I was cleaning the room. 8. I finished my homework. Then I went to bed.(用 before 合并) I went to bed I my homework. 六、根据汉语意思完成句子(注意“主将从现”) 1. 如果明天不下雨,我们就去公园。 If it tomorrow, we will go to the park. 2. 我一到机场就给你打电话。 I will call you as I at the airport. 3. 在她回来之前,我不会离开。 I leave she back. 4. 当你过马路时,要小心。 Be careful you the road. 5. 自从他来到这个城市,他就一直在这里工作。 He here he to this city. 6. 如果你不努力学习,考试会不及格。 you study hard, you will fail the exam. 7. 我正在洗澡的时候电话响了。 The phone rang I a shower. 8. 地震发生时,我正在睡觉。 I when the earthquake . 9. 在离开房间之前,记得关灯。 Remember to turn off the lights you the room. 10. 除非你带地图,否则你会迷路的。 You will get lost you a map with you. 11. 她完成作业后就去睡觉了。 She went to bed she her homework. 12. 我们等到雨停了才离开。 We leave the rain . 七、短文填空(用所给词的正确形式填空) Last Sunday, I was walking home from school when I 1. (see) a car accident. A red car 2. (hit) a bicycle. While I 3. (wait) for the ambulance, I called the police. After the police 4. (arrive), I told them what I had seen. Since I 5. (be) a child, my parents have told me to be careful on the road. If I 6. (see) an accident in the future, I will help again. Before I 7. (leave) the scene, I made sure the injured man was safe. I 8. (stay) there until the ambulance came. As soon as the ambulance 9. (leave), I went home. My mother was proud of me. She said, “You 10. (be) a good boy/girl. I’m glad you helped others.” 参考答案与解析 一、用所给词的正确形式填空 1. rains(if条件句,主将从现,从句用一般现在时) 2. arrive(as soon as时间状语从句,主将从现) 3. comes(until时间状语从句,主将从现) 4. don’t study(if条件句,否定形式) 5. is(if条件句,主语it,用is) 6. go(before时间状语从句,主将从现) 7. has(if条件句,三单用has) 8. returns(when时间状语从句,主将从现) 9. take(unless = if not,条件句用一般现在时) 10.finishes(after时间状语从句,主将从现) 二、用所给词的正确形式填空 1. was reading(while强调进行中,用过去进行时) 2. happened(when+一般过去时,描述瞬间动作) 3. was cooking(过去进行时,表示正在做饭时发生停电) 4. left; sounded(两个动作先后发生,都用一般过去时) 5. has lived; graduated(since引导的从句用一般过去时,主句现在完成时) 6. was waiting(过去进行时,正在等车时下起雨) 7. won’t leave; finishes(until从句用一般现在时表将来) 8. came(as soon as描述过去事件,用一般过去时) 9. have known; were(since从句用一般过去时) 10. stayed; was raining(一般过去时+过去进行时) 三、用适当的连词填空 1. when(从句动作happened为瞬间动作,用when) 2. While/As(强调走路的过程中,用while/as) 3. until(等在这里直到我回来) 4. since(自从大学毕业以来,现在完成时标志) 5. If(条件状语从句) 6. unless(= if you don’t study hard) 7. as soon as(一见到他就告诉他) 8. before(睡觉前关电视) 9. After(完成作业后出去) 10. when/while(当时正在洗澡) 四、单项选择 1. B(if条件句,主将从现) 2. A(as soon as时间状语从句,主将从现) 3. B(until从句用一般现在时,主句否定用won’t leave) 4. B(while强调两个动作同时进行) 5. B(since从句用一般过去时,主句现在完成时) 6. C(although表让步,“即使下雨”) 7. B(unless = if not,不快点就会错过) 8. A(离开厨房前关煤气) 9. B(was having dinner过去进行时,when+一般过去时) 10. C(since从句用一般过去时,主句现在完成时) 五、句型转换 1. after; finish(after引导时间状语从句,主将从现) 2. If; work(if条件句,主将从现) 3. after; stopped(after引导时间状语从句) 4. as soon as(as soon as表示“一……就……”) 5. was watching; when(过去进行时+when+一般过去时) 6. unless; hurry(unless = if not) 7. While; was(while强调同时发生) 8. before; finished(before引导时间状语从句) 六、根据汉语意思完成句子 1. doesn’t rain(if条件句,否定形式) 2. as soon as; arrive(主将从现) 3. won’t; until; comes(until时间状语从句) 4. when; cross(when时间状语从句) 5. has worked; since; came(since引导时间状语从句) 6. If; don’t(if条件句否定) 7. when; was having(过去进行时+when+一般过去时) 8. was sleeping; happened(过去进行时+when+一般过去时) 9. before; leave(before时间状语从句,主将从现) 10. unless; take(unless = if not) 11. after; finished(after引导时间状语从句) 12. didn’t; until; stopped(notuntil“直到……才……”) 七、短文填空 1. saw(描述过去事件) 2. hit(描述过去事件) 3. was waiting(while强调正在等待时) 4. arrived(描述过去事件) 5. was(since从句,用一般过去时) 6. see(if条件句,主将从现,从句用一般现在时) 7. left(before引导时间状语从句,描述过去事件) 8. stayed(描述过去事件) 9. left(as soon as描述过去事件) 10. are(直接引语,现在时) 学科网(北京)股份有限公司 $