初中·課本中不會教你的 516　after you leave還是after you will leave ——需要用一般現在時代替一般將來時的從句

516　after you leave還是after you will leave ——需要用一般現在時代替一般將來時的從句

1　如果主句的謂語動詞用一般將來時，由after, before, when, until, if, as soon as等連詞引導的從句中的謂語動詞，要用一般現在時表示將來，而不可直接用一般將來時。

你走后，我將經常給你寫信。

After you leave , I shall often write to you. （正）

After you will leave , I shall often write to you. （誤）

We won't leave before she comes back . （正）在她回來前，我們不會離開 。

We won't leave before she will come back . （誤）

I shall call on you if it's fine tomorrow .（正）如果明天天氣好，我就去看你 。

I shall call on you if it will be fine tomorrow . （誤）

2　如果主句是祈使句，這類從句也要用一般現在時。

Please wait here until he returns . （正）請在這里等，直到他回來 。

Please wait here until he will return . （誤）

As soon as she arrives , let me know.（正）她一到就馬上告訴我 。

As soon as she will arrive , let me know.（誤）