2023年中考常考知識(shí)點(diǎn)之狀語(yǔ)從句

此處所說(shuō)的狀語(yǔ)從句用法僅包括條件(if和unless引導(dǎo))狀語(yǔ)從句和時(shí)間(when等引導(dǎo),見(jiàn)下文)狀語(yǔ)從句。狀語(yǔ)從句需注意以下問(wèn)題：

01

1.主句若是一般將來(lái)時(shí)、祈使句或含不表過(guò)去的情態(tài)動(dòng)詞等，則if(如果), unless(除非)，when(當(dāng)…的時(shí)候), as soon as(一…就…)，before, after, until, till, as(當(dāng)…的時(shí)候)所引導(dǎo)的狀語(yǔ)從句用一般現(xiàn)在時(shí)。

You may take a rest when you finish doing your work. (主句有情態(tài)動(dòng)詞)

Could you look after my son after I leave home?

(情態(tài)動(dòng)詞could是為了讓語(yǔ)氣委婉，并不指過(guò)去時(shí)，從句仍用一般現(xiàn)在時(shí))

I will go out as soon as it stops raining this afternoon. (主句是將來(lái)時(shí))

Wait for your brother at the bus station until he arrives. (主句是祈使句)

02

2.而主句若是一般過(guò)去時(shí)，從句也要用表過(guò)去時(shí)的適當(dāng)時(shí)態(tài)，如：

I would give the money to the charity if I had a million dollars.

When he got to the park, his classmates had left.

My son ran towards me as soon as he saw me on the street.

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