时态:
1、段时态:
现在完成 :have + 过去分词(截止现在已经完成)
过去完成:had + 过去分词(截止过去已经完成)
将来完成:will have + 过去分词(截止将来已经完成)
2、点时态
(1)一般点(表示一个常态):
一般现在(I am a good boy)
一般过去
一般将来:
will + v/be
be + going to + v
(2)精确点:
一般进行:be + ving
过去进行:be(过去式) + ving
将来进行will + be + ving
(3)进行表示将来:I am coming 我马上来了
(4)进行时表示常态:she is always talking in class 她总是在课堂上讲话
3、杂交时态
(1)过去将来进行:I was going to come.
(2)现在将来进行: You have been sleeping for ten hours.
(3)过去完成进行:She had been eating before we saw her.
(4)将来完成进行:She will have been singing for five hours before 11:00.