首页 > 留学知识库

问题: 动词时态一道单选题

--Tom, did Mr.Li join you in your discussion?
--No, he ________, but he happened to have fallen ill.
A. would like to
B. will
C. was to have
D. was going to join
答案给的C,请问其中这个have如何理解

解答:

我觉得was to have done应该是跟should have done同义吧~~??表本该做的事却没做~~~but后面是指原因~~

have后面省略了join in your discussion