时态概述
动词表示动作、状态或性质，不同时间要用不同的动词形式来表示，这就是动词的时态。初中阶段主要掌握动词常见的八种时态。
现在以动词do的各种时态为例列表如下：
|
序号
|
时态
|
肯定
|
否定
|
|
１
|
一般现在时
|
do/does
|
don’t do/doesn’t do
|
|
２
|
一般过去时
|
did
|
didn’t do
|
|
３
|
现在进行时
|
am/is/are doing
|
am/is/are not doing
|
|
４
|
过去进行时
|
was/were doing
|
was/were not doing
|
|
５
|
一般将来时
|
shall/will do
|
shall/will not doing
|
|
６
|
过去将来时
|
should/would do
|
should/will not do
|
|
７
|
现在完成时
|
have/has done
|
have/has not done
|
|
８
|
过去完成时
|
had done
|
had not done
|
