1.一般现在时:表示主语现在的特征,经常反复发生的动作或客观真理.
eg: The sun rises in the east every morning.
2.一般过去时:表示过去某一时间发生过的动作或主语所处的状态.
eg: He had an accident two years ago.
3.一般将来时表示将来发生的动作或存在的状态.
eg: My sister will finish her middle school this year.
4.现在进行时:表示此刻或现阶段正在进行的动作.
eg: It is raining heavyly.
5.过去进行时:表示过去某一时间正在进行的动作,常与表示过去的时间状语连用.
eg: What were you doing at this time yesterday?
6.将来进行时:表示在将来某一时间内正在进行的动作.
eg: We will be having a test tomorrow.
7.现在完成时:表示某一动作从过去就开始,但一直持续到现在,或是过去发生的动作,对现在留下一定的后果或影响.
eg; I have read that story.
8.过去完成时:表示过去某个时间以前已完成的动作或存在的状态,强调"过去的过去".
eg; When they arrived, the flight had already taken off.
9.将来完成时:表示将来某一时刻将完成或在另一个未来的动作发生之前已经完成的动作,也可用来表示一种猜测.
eg: He will have travelled 1000 miles on foot by mow.
10:.现在完成进行时:表示从过去某个时间开始一直持续到现在的动作,这个动作可能延续到说话时刚刚结束,也可能还要持续下去.
eg: They have been playing the piano for three hours.
11.过去完成进行时:表示动作从过去某个时间开始,到过去某一时间仍在进行或刚刚结束.
eg: She told me that she had been waiting there for three hours.
参考资料：http://www.52en.com/whbm/grammar/index.htm