had to be built为啥加had?
1个回答
had to,have to的过去时,意为“必须做”
have to build 必须建
相关问题
A site had to be found for it._____ had to be found
It____this way.A.is had to do B.is had to be done C.had to b
帮忙讲几个英语句子1.Now he had to live in the house he had built none
It had been built with remarkable speed.
the airport had built years ago 和 the airport was built year
the street lights had to be on all day.had to be on 是什么意思?又是
She had to be in hospital
it ___ this way.A is had to do B is had to be done C has to
had better要加to吗
6.It_______this way A .is had to do B .is had to be done C .