1. I'm taking my students to the park on next Sunday.

= I'm going to take my students to the park on next Sunday.

(2) 如果动词为come或go，在表示将来时，常用be doing结构。

e.g. We're going to Shanghai next week. (to是介词)

2. be to do

(1) 表示按计划、安排即将发生的动作，常见于报纸和广播，用以宣布官方

的计划或决定。

e.g. The Queen is to visit Vietnam next month.

(2) 表示命令、禁止（否定式）等。

e.g. Since you've done something wrong, you are to stand here.

If you are late, you are to stand outside the door.

Tell her that she is not to be back late.

△ be doing和be to do都可以表示按计划、安排将要发生的事态，两者常常

可互换，但be to do较常用于正式语体。

3. be about to do

刚要做某事，正要做某事。表示非常近的将来，不与表将来的时间副词连用。

e.g. He is about to leave.

注意：不可以说He is about to leave tomorrow.

△ be about to do...when...：正要做......，这时......

e.g. He was about to start when it rained.

I was about to lock the door when the telephone rang.

4. 一般现在时

(1) 用一般现在时表将来时间，常见于条件状语从句和时间状语从句中。

e.g. I'll tell her about it if she comes.

I'll give it to you after I return.

I'll call you as soon as I arrive.

(2) 在主句中用一般现在时表示将来时间通常指按照时间表或既定日程一定

会发生的将来事态。

e.g. Tomorrow is Sunday.

She retires next year.

When do you take your next exam?

△ 一般现在时表将来时间所暗示的计划比较客观，因而更具有不可变易性，

而且一般现在时表将来时间在口气上也比较正式。

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