學(xué)習(xí)時間狀語從句的幾點注意

1. 引導(dǎo)時間狀語從句的從屬連詞很多，常見的有before, after, when, while, as, since, till, until, as soon as 等。

2. 表示“當(dāng)…時候”的 while, when, as 的用法區(qū)別是：while從句中的謂語動詞必須是延續(xù)性動詞；表示帶有規(guī)律性的“每當(dāng)”或當(dāng)主、從句謂語動詞的動作發(fā)生有先后時，只能用 when；當(dāng)表示“一邊…一邊…”或“隨著”時，只能用 as。另外，用于此義的 as 所引導(dǎo)的時間狀語從句謂語只能是動作動詞，不能是狀態(tài)動詞。如下面一道高考題的答案是 B 而不能是A：

“I’m going to the post office.” “_____ you’re there, can you get me some stamps?”

A. As                          B. While                     C. Because                      D. If

3. until 在肯定句中通常只連用延續(xù)性動詞，表示相應(yīng)動作結(jié)束的時間；在否定句中通常連用非延續(xù)性動詞，表示相應(yīng)動作開始的時間，意為“直到…才”。如：

He waited until she was about to leave. 他等著一直到她準(zhǔn)備離開。

I did not begin to work till he had gone. 他走了后我才開始工作。

4. 表示“一…就”除用 as soon as 外，還可用 the minute, the second, the instant, immediately, directly, instantly, no sooner…than, hardly…when 等。如：

I came immediately you called. 你一來電話我就來了。

Hardly had she arrived when it began to snow. 她剛到就下起雪來了。

The moment I have finished I'll give you a call. 我一干完就給你打電話。

5. every time, each time, (the) next time, (the) last time, by the time, the first time, any time 等以 time 結(jié)尾的詞語也可用作連詞，引導(dǎo)時間狀語從句。如(www.hz123456.com)：

Next time you come in, please close the door. 下次你進來，請關(guān)門。

He didn’t tell me anything the last time I saw him. 上次我見到他時他什么也沒告訴我。

By the time I got home, she had already gone to bed. 我到家時她已睡覺了。