Ⅰ动词
1. 时态
1)现在完成进行时态 : 动作或状态从过去某时开始,继续到现在,可能继续下去,也可能刚刚结束.
Ive been writing letters for an hour.
Ive been sitting in the garden.
2)过去完成进行时: 过去某个时刻以前一直在进行的动作
Id been working for some time when he called.
We had been waiting for her for two hours by the time she came.
3)将来完成进行时: 将来某个时刻以前一直在进行的动作.
By next summer, he will have been working here for twenty years.
In another months time shell have been studying here for three years.
4)将来完成时: 将来某时会业已发生的事.
I shall have finished this one before lunch.
Theyll have hit the years target by the end of October.
2. 语态
1) 可以有两种被动结构的类型,例如:
He was said to be jealous of her success.
It was said that he was jealous of her success.
能同时适用于上述两个句型的主动词通常都是表示估计,相信等意义的动词,常见的有assume,believe,expect,fear,feel,know,presume,report,say,suppose,understand等.
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