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时态
1、常用时态的形式：(以动词“study”为例）
时间：现在 过去 将来 过去将来
状态
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一般 study studied shall/will study should /would study
studies
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进行 am/is/are was/were shall/will be should/would be
studying studying studying studying
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完成 has/have had shall/will should/would
studied studied have studied have studied
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完成 has/have had been shall/will should/would
进行 been studying studying have been studying have been studying
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2、理解上表的要点：
1）、过去将来：表示过去某时看来将要发生的动作或情况。
2）、完成时与完成进行时的区别：完成进行时比完成时更强调动作的延续性。
E：He has been watching TV for three hours (强调他还要看下去）
He has been watched TV for three hours（不一定要看下去了）
3、某些时态的不同表示方式：
1）、表示将来发生的动作或情况的几种形式：
a. shll/will +动词原形
b. be going to do sth 常用来表示最近打算要做的事情或即将发生的事 |
