1.一般现在时：
在时间、条件状语从句中表示将来的动作用一般现在时：常用的连词有as soon as, when，till, if等。
e.g. When he comes back, he will go and see his cousin in hospital.
If it rains tomorrow, the sports meet will be put off.
The porter will wait till the train arrives.
2.一般过去时：
used to do sth.
be used to doing sth.
be used for
e.g. The architect used to take the dog for a walk after supper when he lived here.
Now he is used to browsing the newspapers in the evening.
The pan is used for cooking.
3.一般将来时：
表示将来的动作或状态。
a) will (shall) +原形动词：
e.g. Peter will take robotics next semester.
b) 某些表示开始、终结、往来行动的动词如：go ,come, start, arrive, leave等的现在进行时可表示将来。
e.g. The police are leaving for Brasilia tomorrow.
The foreign guests are arriving in Jinan tonight by air.
Are you going to attend the lecture tomorrow afternoon?
c) be to +动词原形： 表示安排或计划好了的动作。
e.g. The new road to the museum is to be open to traffic before National Day.
d) be about to +动词原形：表示即将发生的动作。
e.g. The lecture is about to begin.
4.过去将来时：
表示在过去预计将要发生的动作，常用于宾语从句。
e.g. The freshmen wanted to know when the sports meet would start.
5.现在进行时：
表示此时此刻（说话时）正在进行的动作。现阶段正在进行的动作，但此刻并不一定在进行。
e.g. My nephew is having an English class in Beijing Normal University.
The workers are building a museum near the stadium. Gymnasium
6.过去进行时：
a) 表示在过去某一段时间正在进行的动作。常用表示过去的时间状语或通过上下文来判断。
e.g. The sailor was reading a French novel from seven to nine last night.
b) when 和while 的用法
e.g. While John was eating, my brother-in-law walked to him and asked him to lend him $100.
When the plane arrived, some of the detectives were waiting inside the main building
c) 表示过去将来的动作。现在进行时可以表示将来的动作，同样，过去进行时也可以表示从过去某时间看将来要发生的动作。
e.g. The president was leaving early the next morning.
7. 现在完成时：
a) 表示动作刚刚结束（常和just, already, yet等词连用）；或表示动作的结果（一般不用时间状语）。
e.g. Jefferson has just turned off the light.、
b) 表示过去某时开始的动作一直延续到现在，并且可能会继续延续下去（常用since引导的短语或从句，或由for 引导的短语连用）。
e.g. The astronaut has been engaged in the research for 30 years.
They’ve known each other since childhood.
c) 非延续性动词的完成时和it is +时间+since…..（过去时）
英语中有些动词不能延续， 因此不能和表示延续的时间状语连用。
e.g. It is (has been) an hour since the delegation arrived here.
It is 3 years since the diver left Shanghai.
d) have (has) been to 和have (has) gone to 的区别
have (has) been to:去过某地（表示某人的一种经历），可以和once, twice, often, never, ever连用。
have (has) gone to:
e.g. The novelist has gone to the Yellowstone National Park.
The novelist has been to the Yellowstone National Park twice.
8. 过去完成时
a) 表示在过去某一时间或动作之前已经完成了的动作（即过去的过去）。这个过去的某一时间可用 by , before等介词或连词引导的短语或一个从句来表示。
e.g. by the end of last year, the chemist had worked here for five years.
b) 表示从过去某一时间开始，一直持续到另一个过去的时间的动作。
e.g. The meeting had been on for two hours when we arrived there.
c) 在含有as soon as 等连词引导的状语从句的复合句中，主句和从句都可以用一般过去时表示，而不用过去完成时。
e.g. I called him as soon as I got ticket of Beijing 2008 Olympic Games.
d) 过去完成时常用在no sooner …than…, hardly/scarcely/barely, rarely …when…，“一…就…”句型之中，句子倒装。
e.g. Scarcely had he opened the door when a gust of wind blew the c and le out.
9. 将来完成时：
表示在将来某一时间以前完成的动作。
e.g. by the time the next train arrives, the governor will have left.
e.g. The scientist will have finished writing the article by the time you get back.
10. 现在完成进行时：
表示从过去某时刻一直延续到现在的动作，这个动作一般会继续延续下去，或是到说话时结束， 但是强调到说话时为止一直在做的动作。
e.g. The Rices have been waiting on the platform for ten minutes now without seeing her.
