一、用括号内所给词的正确形式填空。
1. I was reading in the library when it ______ (begin) to rain.
2. When the group (discuss) the plan to help homeless pets, they received a phone call.
3. While Linda was sleeping, Jenny (share) a story with Mary.
4. As soon as he (get) up tomorrow morning, he will read English texts.
5. I (not go) to play basketball until I finish washing my clothes.
6. As soon as I finish my homework, I (help) my mum with some housework.
7. He didn't go to bed until he (finish) reviewing his lessons.
8. He waited till the last person (leave) the meeting room.
9. We should plan everything carefully before the trip (start) next week.
10. After we had dinner, we (watch) an English movie.

1. began
2. was discussing
3. was sharing
4. gets
5. won't go / will not go
6. will help
7. finished
8. left
9. starts
10. watched

本题考查不同引导词（when/while/as soon as/until/till/before/after）引导的时间状语从句的时态呼应规则：
1. 主句为过去进行时，when引导的从句描述过去突然发生的短暂动作，需用一般过去时，begin的过去式为began。
2. 主句为一般过去时，when引导的从句强调过去某一时间段正在进行的动作，用过去进行时，主语the group表整体，be动词用was，故填was discussing。
3. while引导的从句用过去进行时表过去正在发生的动作，主从句动作同时进行，主句也要用过去进行时，主语Jenny是第三人称单数，be动词用was，故填was sharing。
4. as soon as引导时间状语从句，遵循“主将从现”规则：主句为一般将来时，从句用一般现在时表将来，主语he是第三人称单数，谓语动词用gets。
5. until引导时间状语从句，遵循“主将从现”规则，从句用一般现在时，主句用一般将来时的否定形式。
6. as soon as引导时间状语从句，遵循“主将从现”规则，从句为一般现在时，主句用一般将来时。
7. 主句为一般过去时，until引导的从句描述过去发生的动作，用一般过去时，finish的过去式为finished。
8. 主句为一般过去时，till引导的从句描述过去发生的动作，用一般过去时，leave的过去式为left。
9. before引导时间状语从句，用一般现在时表将来的动作，主语the trip是第三人称单数，谓语动词用starts。
10. after引导的从句描述过去先发生的动作，主句描述过去之后发生的动作，用一般过去时，watch的过去式为watched。

二、根据要求完成下列各题。
1. We were playing chess. At this time, it began to rain. (用适当的连词合并句子)
We were playing chess it began to rain.
2. He finished his book report. He handed his book report in at once. (合并为一句)
He handed his book report in he finished it.
3. My father came back last night. After that, my little sister went to bed. (用 not ... until ... 合并句子)
My little sister go to bed my father came back last night.
4. I was cooking dinner. My brother was setting the table. (用 while 合并句子)


5. Many students there did not have a chance to study. The project started. (用 before 合并句子)

1. when
2. as soon as
3. didn't; until
4. I was cooking dinner while my brother was setting the table.
5. Many students there did not have a chance to study before the project started.

1. 考查时间状语从句的固定搭配，"be doing sth. when..." 表示“正在做某事，这时……”，契合原句“我们正在下棋，此时天开始下雨”的语境，填入连词when。
2. 考查时间状语从句的引导短语，三个空对应as soon as，含义为“一……就……”，符合原句“他刚完成读书报告就立刻上交”的语义。
3. 考查not...until...（直到……才……）的结构用法，原句时态为一般过去时，实义动词go的否定形式需要借助助动词didn't，第二空填until，合并后语义为“我的小妹妹直到昨晚爸爸回来才上床睡觉”。
4. 考查while引导时间状语从句的用法，while可强调主从句两个延续性的过去动作同时发生，两个分句都用过去进行时，用while连接两个分句即可。
5. 考查before引导时间状语从句的用法，before意为“在……之前”，将“项目启动”作为时间状语置于主句之后，合并后语义通顺。