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时态是英语中一个重要的语法范畴，它表示不同时间发生的动作或存在的状态以及动作发生或存在的方式。英语中有16不同时态。大体可归纳为：
一般时态：包括一般现在时、一般过去时、一般将来时和一般过去将来时
进行时态：包括现在进行时、过去进行时、将来进行时和过去将来进行时
完成时态：包括现在完成时、过去完成时、将来完成时和过去将来完成时
完成进行时态：包括现在完成进行时、过去完成进行时、将来完成进行时和过去将来完成进行时
以do为例的16种时态形式：
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一般时态 |
进行时态 |
完成时态 |
完成进行时态 |
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现在 |
do (does) |
am (is / are) doing |
have (has)done |
have (has)been doing |
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过去 |
did |
was (were) doing |
had done |
had been doing |
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将来 |
will (shall) do |
will (shall) be doing |
will (shall) have done |
will (shall) have been doing |
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过去将来 |
should (would) do |
should(would )be doing |
should (would) have done |
should (would) have been doing |
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