一、一般将来时的特殊用法
①be going to +不定式，表示将来。否定句或疑问句直接在be动词后加not或提到句首。
a. 主语的意图，即将做某事。What are you going to do tomorrow?
b. 计划，安排要发生的事。 The play is going to be produced next month。
c. 有迹象要发生的事。 Look at the dark clouds, there is going to be a storm.
②某些动词的进行时表示将来，通常表示按计划、安排即将发生的动作。
常见的动词有：go, come, leave, start, arrive, return, spend, meet, fly等。
The bus is coming.
汽车来了。
He is flying to Tibet tomorrow.他明天要飞往西藏。
③一些动词用一般现在时表示将来，但必须与未来的时间状语连用。
常见的动词有egin, come, go, leave, sail, start, arrive, meet, return等。
Class begins at 8:00 am.上午8点开始上课。
We return to Italy tomorrow morning.
我们明天上午返回
④be+动词不定式，表示安排、命令或预定要做的事情。
Where are you to meet this evening?你们约定今晚在哪见面?
⑤be about to do sth.表示“即将做……”或“就要做……”
I was about to leave home when the telephone began to ring.
我正要离开家，电话铃突然响了。
二、过去时的特殊用法
1.wish, wonder, think, hope 等用过去时，作试探性的询问、请求、建议等。
I thought you might have some. 我以为你想要一些。
2.用过去时表示现在，表示委婉语气。
①动词want, hope, wonder, think, intend 等。
Did you want anything else?
I wondered if you could help me.
②情态动词could, would.
Could you lend me your bike?
