是不是所有介词后面都不可以作主语吖 为什么All we have to do is to wait All we hav

是不是所有介词后面都不可以作主语吖 为什么All we have to do is to wait All we hav 我们老师说介词后不能做主语.为什么 为什么All we have to do is to wait All we hav All we have to do is to wait怎样分主谓宾吖 all we can do is to 为什么能用两个动词 英语翻译All we have to do is toilet train the world and we''ll n 英语语法：为什么是All I need to do is wait all we'd have to do to make use of sea water in the world is All that we have to do is to practise everyday.能否将that改为what All i could do is to wait.的主语是"I could do''吗 all we can do is to 为什么能用两个动词 is 跟 do In answer to your question all that I can say is that we hav All I have to do is dream\ now that we found love