2022届高考英语二轮复习:While的用法课件(17张ppt)

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名称 2022届高考英语二轮复习:While的用法课件(17张ppt)
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科目 英语
更新时间 2022-01-06 20:50:08

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(共17张PPT)
THAT'S RIGHT,
I'M LAZY!
while 的用法
用作名词
01
用作连词
02
CONTENTS
01
用做名词
while 用作名词时,意为“一段时间,一会儿”。
I stayed there for a short while.
(我在那儿呆了一小会儿。)
The postman came a short while ago.
(邮递员刚刚来过。)
02
用作连词
引导时间状语从句
原因状语从句
条件状语从句
让步状语从句
并列句
while 用作连词时,有以下几种含义:
1. 意为“当……时候,和……同时”,引导时间状语从句。
While I was watching TV, the bell rang.
(我看电视时,铃响了。)
Meimei watched TV while she ate her supper.
(梅梅边吃晚饭边看电视。)
2. 意为“虽然,尽管”,引导让步状语从句。
While it was late, he went on working.
(虽然很晚了,但他还在继续工作。)
While he is in poor health, he works hard.
(虽然他身体不好,但他还是努力工作。)
3.引导条件状语从句 相当于as long as,译作“只要”。

While there is life, there is hope.
(有生命,就有希望。)
While a spark of life remains, it is a doctor's duty to save the patient.
(只要病人还有一息生机,医生就有责任挽救。 )
4.引导原因状语从句, 相当于since, 有“既然”的意思。

You'll never save any money while you're so extravagant.
(你这么奢侈,永远存不下钱来。 )
I'd like to get it settled today while we're at it.
(既然我们着手干了,我想今天就把它干完。 )
5. 连接两个并列句子,表示“对比”关系。
He went out for a walk, while I stayed at home.
(他出去散步了,而我却呆在家里。)
I like singing while she likes dancing.
(我喜欢唱歌,而她喜欢跳舞。)
You like sports, while I prefer music.
(你喜欢体育,而我更喜欢音乐。)
03
注意的点
01
02
03
位置
省略
when和while
三、 while 引导状语从句时,应注意以下几点:
1. while 引导的时间状语从句既可放在句首,也可放在句末;而 while 引导的让步状语从句一般放在句首,不放在句末。另外,也可以从意义上加以区分。
While he was tired, he went on working.
(虽然他累了,但他还是继续工作。)
( while 引导让步状语从句)
While he was tired, he would have a rest. (他累了就休息一会儿。)
( while 引导时间状语从句)
2. while 引导让步状语从句时,如果从句的主语和主句的主语相同,那么从句的主语和谓语动词 be 都可以省略。例如:
While he was ill, he went there.
(= While ill,he went there.)
(虽然他有病,但他还是去那里了。)
3. while 和 when 都可以引导时间状语从句,
但应注意:while 引导的时间状语从句中的谓语动词必须是延续性的动词;而 when 引导的时间状语从句中的谓语动词既可以是延续性动词,也可以是非延续性动词。
当时间状语从句中的谓语动词是延续性动词时, while 和 when 可以互相替换。例如:
While we were talking, the teacher came in.
(我们正在谈话时,老师进来了。)
The bus had left when we arrived at the bus stop.
(当我们到达车站时,公共汽车已经开走了。)
( arrive是非延续性动词,因此,此句中的 when 不能用 while 替换。)
When / While we were having a meeting, our teacher came in.
(我们正在开会时,老师走了进来。)
( have 是延续性动词,因此,句中的 when 可以用 while 替换。)
04
练习
Exercise
1. he likes his students, he is very strict with them.
2.Some people waste food others haven't enough.
3.I ought to have helped her, I never could.
4. he woke up,it was eight o'clock.
5. I was waiting for a bus,I met her.
6. the teacher came into the classroom ,we were reading English
When
While
While/When
when
while
but
THAT'S RIGHT,
I'M LAZY!
感谢聆听
education