您好,現(xiàn)在冰冰來為大家解答以上的問題。when引導(dǎo)時間狀語從句省略情況，when引導(dǎo)時間狀語從句的用法相信很多小伙伴還不知道,現(xiàn)在讓我們一起來看看吧！

1、時間狀語從句: 連接時間狀語從句的連接詞有: (1) 連詞：when, while, as. 它們都表示當(dāng)…時候的意思。

2、如果主句和從句的動作同時發(fā)生且都是進(jìn)行時 態(tài)，只用while, as. 其他情況下when, while, as通用。

3、 1 When he came in, I was listening to the radio． 2 As I was wandering in the street, I met her. 3 While (as) I was watching TV, my mum was cooking in the kitchen. (2) 連詞before, after, since, until(till). 當(dāng)他們表示時間時，他們既是介詞又是連詞。

4、 { He usually drinks a cup of tea before he goes to school. 連詞 He usually drinks a cup of tea before going to school. 介詞 { He usually drinks a cup of coffee after he comes back from school. 連詞 He usually drinks a cup of coffee after coming back from school. 介詞 { I have lived in Dalian since my son was born in 1999. 連詞 通常情況下，主句用現(xiàn)在完成時，從句用一般過去時。

5、 I have lived in Dalian since 1999. 介詞 { I will wait here until(till) you finish your job. 連詞 I will wait here until(till) 8pm. 介詞 (3) 詞組：as soon as { I will tell him as soon as he comes back. As soon as she finishes her homework, she will play tennis. 通常情況下，主句用一般將來時，as soon as 引導(dǎo)的從句用一般現(xiàn)在時。

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