while和when引導(dǎo)的時(shí)間狀語從句主句用一般時(shí)

1、while和when引導(dǎo)的時(shí)間狀語從句，主句用一般過去時(shí)從句用過 去進(jìn)展.while引導(dǎo)的從句要加延續(xù)性動(dòng)詞，而 when延續(xù)和短暫 性動(dòng)詞都可以，。6.另外，when和while的區(qū)別還在于：while引導(dǎo)的時(shí)間狀語從句 多用過去進(jìn)展時(shí)態(tài)，而 when引導(dǎo)的時(shí)間狀語從句多用一般過去時(shí) 態(tài)。While they were talking , the bell rang.正在他們談話的時(shí)候，上課鈴響了。I was doing my homeworkwhen my mother came back homeyesterday eve ning.昨天晚上媽媽回家的時(shí)候，我正在做家庭作業(yè)。I am c

2、ooking while Jane is practicing.我在做飯的時(shí)候簡正在練習(xí)。當(dāng)此句改變主從句的位置時(shí)，那么用 when引導(dǎo)。When the teacher came in ，we were talkingThey were sweeping the floorwhen the teacher came in.教師進(jìn)來時(shí)這一時(shí)刻，他們在擦地板。While they were sweeping the floor ，the teacher came in.他們正擦地板時(shí)這段時(shí)間，教師進(jìn)來了。2. whe n說明從句的動(dòng)作和主句的動(dòng)作可以是同時(shí)，也可以是先后 發(fā)生；while那么強(qiáng)調(diào)

3、主句的動(dòng)作在從句動(dòng)作的發(fā)生的過程中或主從句兩個(gè)動(dòng)作同時(shí)發(fā)生。例如:They were singingwhile we were dancing.He fell asleep whe n he was read ing.他看書時(shí)睡著了。1. While we(wait)for the bus,a girl(run)up to us.2.1 (teleph on e)afrie ndwhe nBob(come)i n.mother(put)Cathy to bed,the door bell(rin g).7.whe n I(walk)in the park,it(beg in) to rai n

4、.9.George(read)whe n they(hear)a knock at the door.1.1 (have)my breakfast t at half past six yesterday morni ng.3.Whatyou(do)at that time? We(watch)TV.(have)ameet ingat4yesterdayafternoon?No,they.They(clea n) the classroom.the bell rang,jenny(wait )in her seat.14.She(make)her dress the whole after n

5、oon.1 a meal when youme.a. cooked, were ringingb. was cooking, rangc. was cooking, were ringing d. cooked, rang2.He said he to draw a plane on the blackboard at that time.a. tries b. tried c. was trying d. will try3. While she TV, she a sound outside the room.a. was watching, was hearing b. watched,

6、 was hearingc. watched, heard d. was watching, heard4. They a football game from 7 to 9 last night.a. were watching b. watch c. watched d. are watching10.He his father on the farm the whole afternoon last Saturday.a. helps b. would help c. was helping d. is helping11.While mother some washing, I a kite for Kate.a. did, made b. was doing, made c. was doing, was making d. did, was making13.He some cooking at that time, so he mea. did, heard b. did, didn't hear c. was doing, heard d. wasdoing, didn't hear14.This time yesterday jack his bike. He TVa. re