时态

1 、现在时态

现在完成进行时态—We have just moved into a new house and I have been working hard all morning.
用来强调动作在某一段时间内一直在进行，而且动作有现在的结果。现
在为止，该动作可能已不再继续进行，也可能还在继续进行，这要根据上下文来确定。
have been doing 句子中长用表示时间的词语如all day，all morning等或for 和since。
how long开头的疑问句中 I have been reading the book. for 15 years. 还没看完, 还要继续

现在完成时——It has rained for half day. 在漫长地时间段，过去发生的, 还一定要对现在产生影响；
在过去发生的动作, 一直延续到现在，现在完成时, 动词一定是延续性动词
have +done 表示已完成的动作I have read the book. 书已看完

He has rung me up five times since 12 o’clock.

2 一般时态 常用的两个词是once 和recently，
一般过去时-- 可以用于与最近的打算比较时。
You’re still in bed and the sun has already risen! All the students rose when the teacher came into the
classroom.



3将来完成时态
1将来完成时态 will have done 表示将来某一时刻已经完成的动作，必须和莫格时间状语连用
强调到将来某一点时间动作的结束
Workers will have completed the new roads by the end of this year
2将来进行时的构成will be doing，表示将来某个时候正在进行的动作或表示计划好的事，陈述将来
的
事实。They will be arriving here tomorrow.
3将来完成进行时的构成will have been doing，表示某种状况一直持续到说话人所提及的时间，从某
一点发生, 一直延续到将来的某一点, 并且将可能延续下去，强调到将来某一点时间动作可能结束或
延续。 By this time next week, I will have been working for this firm for twenty years.
By Friday midday, they will have been working on it for seven days.



4过去完成进行
1过去完成 进行时用于强调某动作在过去更早的某一段时间内一直在进行，并对过去某一时刻产生结
果，
过去完成进行时也可用来表示过去经常重复的动作，还可以表示根据直接或间接的证据而得出结论。
与它 经常连用的表示时间的词有before，for，since，all day等。
She was very tired. She had been typing letters all day.
Jill was angry. Jim had been phoning her every night for a whole week.
Her eyes were red. It was obvious she had been crying.
过去完成进行时的构成：had been +现在分词

在 if从句里设想纯粹想像的事情，在主句里讲述想像的结果，谈的是没有或永远不可
能有的结果，指的是过去没有过的事情。第 3类条件句的基本结构是if从句用过去完成时，主句用
would
have should have +过去分词：
If it had rained, we would have stayed at home.
If I had worked harded at school, I’d have got a better job.
在if从句中可用could have +过去分词代替had been able to +动词原形：
I’d have read that book if I could have bought it.