have to 跟have to be have to 有义务去做某事，后面跟 do，即省略to的动词不定式，因为have to 看成半助动词。如： I have to go. 我得走了 …
had to be - 英中 – Linguee词典. 英语-中文 正在建设中. 例子: have profound import (idiom); to be deeply significant — 寓意深长. lit. have …
This exercise had to be carried out in three months. This was COMPELLED to complete. Did not meet deadline if you put …
So you have to find another way of expressing that sense—another word or phrase. It might be BE asked or BE supposed, as in your …
第一个 had 是过去完成时 的助动词——过去完成时的标志；第二个 had 是用作实义动词 —— have 的过去分词 ，于是，两个就构成了过去完成时 …
更多内容请点击：have to 跟have to be - 百度知道