[高中]全新語法:時間狀語從句 一、從屬連詞的分類

一、從屬連詞的分類

1.表示“當(dāng)……時候”或“每當(dāng)”的從屬連詞：when，while，as，whenever

Don’t talk while you’re eating.吃飯時不要說話。

Vegetables are best when they are fresh.蔬菜新鮮時最好吃。

He came just as I was leaving.我正要走時他來了。

I’d like to see you whenever it’s convenient.一有方便的時間，我就去看你。

2.表示“在……之前（或之后）”的從屬連詞：before，after

Try to finish your work before you leave.離開前設(shè)法把工作做完。

After we have finished tea，we will sit on the grass.喝完茶之后我們將坐在草地上。

3.表示“自從”或“直到”的從屬連詞：since，until，till

She’s been playing tennis since she was eight.她從八歲起就打網(wǎng)球了。

Hold on until I fetch help.堅持一下，等我找人來幫忙。