
英语共有十六种时态,其表现形式如下(以study为例):
| 
 | 一般时 | 进行时 | 完成时 | 完成进行时 | 
| 现在 | study | am studying | have studied | have been studying | 
| 过去 | studied | was studying | had studied | had been studying | 
| 将来 | shall study | shall be studying | shall have studied | shall have been studying | 
| 过去将来 | should study | should be studying | should have studied | should have been studying | 
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