have的用法they would have the man----if they thought it necessaryA.to be followed B.to follow C.following D.followed请问有没有have sb to do?

BBC一句话They don't have the infrastructure that they would have had.中that they would have had.怎么翻译,有什么用法吗? 英语 would have done 和should have done 的用法 relax用法They would like to have a vacation.应该怎么用relax? have的用法they would have the man----if they thought it necessaryA.to be followed B.to follow C.following D.followed请问有没有have sb to do? they would have a party the next day 的被动 ~ 英语语法：关于类似pass unnoticed一类的用法解析例句：if they had only one more child the fact would have passed unnoticed.I returned home exhausted.She went away unobserved.是过去分词作后置定语的用法吗. would like 的用法 would rather 的用法 would rather 的用法 would prefer的用法 would的用法. would的详细用法 would的结构用法 if they had only had one more child, the fact would have passed unnoticed.这句话中的第二个have是什么用法,怎样翻译,为什么用have? if they had only had one more child,the fact would have passed unnoticed.这句话中的第二个have是什么用法,怎样翻译,为什么用have. 初一英语;They would like to take photos with him,翻译并指出would like 的用法． ___ had enough time,they would have visited the Great Wall.A) Had they B) Have they C) Would they have D) If they如何知道是虚拟语气的? should have done .would have done. must have done三者之间的意思和用法上有什么区别?