的标志，表示正在进行的动作的客观状况，所以后句用一般现在时。

　　5).表示按规定、计划或时间表将要发生的事。

　　He starts next week. 他下个星期出发。

　　We leave very soon. 我们很快就离开。

　　The train starts at 10 o'clock in the morning. 火车将在早上10点开出。

　　这类用法限于表示"移动"的动词：go去，come来，leave离开，start出发，begin开始，arrive到达，take off起飞，等。

【特殊用法表将来】

　　1）下列动词：come, go, arrive, leave, start, begin, return, live, fly的一般现在时表将来。这主要用来表示在时间上已确定或安排好的事情。

　　The train leaves at six tomorrow morning.

　　When does the bus start? It starts in ten minutes.

　　2）倒装句，表示动作正在进行，如：Here comes the bus. = The bus is coming.

　　 There goes the bell. = The bell is ringing.

　　3）在时间或条件句中。

　　When Bill comes (不是will come), ask him to wait for me.

　　I'll write to you as soon as I arrive there.

　　4）在动词hope, make sure that等后。⑴ I hope they have a nice time next week.

　　⑵ Make sure that the windows are closed before you leave the room.

当堂检测 Have a in-class test (C级)

1. "I don't like to travel. ""Have you ever _____ in an airplane?"

　A. flying B. flew C. flowed D. flown

2. The center of gravity of the human body ______ behind his joint.

　A. located B. locating C. to locate D. is located

3. "Today is very cold, isn't it?" "Yes, the river is _____ over."

　A. freezed B. freeze C. frozen D. freezing

4. "What happened in that new area?" "New houses ______ recently over there."

　A. are built B. build C. have built D. have been built

5. "When did you go to work?" "As soon as they came, we ______ to work."

A. went B. were going C. had gone D. go

6. "Did you wait for him very long?" "Yes, I ______ to bed until five in the morning."

A. did go B. didn't go C. had gone D. went

7. Perhaps it will be a long time ______ from abroad.

A. when Tom comes back B. when Tom will come back

C.before Tom comes back D. that Tom comes back

8. Tom ______ mathematics throughout his college life.

A. bored B. bored with C. was bored D. was bored with