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…時候的意思.如果主句和從句的動作同時發(fā)生且都是進行時
態(tài),只用while,as.其他情況下when,while,as通用.
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).當他們表示時間時,他們既是介詞又是連詞.
{ 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.
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 引導的從句用一般現(xiàn)在時.