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一、一般現(xiàn)在時

1. 在表示時間、條件的狀語從句中,用一般現(xiàn)在時表示將來的概念。如:

As soon as he comes back, I’ll tell him when you will come and see him.

If they are kept for too long, some medicines will lose their effectiveness.

2. 一些轉(zhuǎn)移動詞come, go, arrive, leave, start, begin, return等的一般現(xiàn)在時表將來,用來表示在時間上已確定或安排好的事情。如:

The yearly meeting starts 10 o’clock next Friday.

My plane leaves at 8:30 tomorrow morning.

二、現(xiàn)在進(jìn)行時

1. come, go, start, arrive, leave, stay, die, stop, start, finish, approach等非延續(xù)性動詞的現(xiàn)在進(jìn)行時表示近期按計劃或安排將要發(fā)生的動作。如:

The time is approaching when we must think about buying a new house.

Are you staying here till next week？

2. 現(xiàn)在進(jìn)行時與always, constantly, forever等連用,表示意想不到或使人煩惱的事情。如:

She is always borrowing money and forgetting to pay back.

3. 在表示時間、條件的狀語從句中,用現(xiàn)在進(jìn)行時表示將來進(jìn)行時。如:

Be careful when you are crossing the street.

If Tom is doing his homework when you come back, don’t disturb him.

三、現(xiàn)在完成時

在時間和條件狀語從句中,用現(xiàn)在完成時代替將來完成時。如:

I’ll phone you after I have talked about this matter with my parents.

We’ll go to the cinema if we have finished our essay by that time.

現(xiàn)在完成時經(jīng)常與for ...,since ...,till(until), now, up to the present (now),so far, in the past (last) ...,already, yet, recently, lately, ever, never這些狀語連用。

四、一般將來時

1."will / shall +動詞原形"與"be going to +動詞原形"的區(qū)別:

"will / shall +動詞原形"表示單純的將來或在說話時臨時決定要去做某事。如:

There will be a lecture at the Children’s Palace at seven this evening.

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