当做助动词的时候要提前.比如说.I have came back .这里的疑问句要提前成了have you come back?实意动词就不用了,要用相应的主动词did或者do,does提问,提前.原句many and daming have art on wednesday.你确定原句正确？、、麻烦检查一下many，daming，wednesday.首字母大写这里的have是有的意思，不用提前的。。什么时候提前举例I have came back .这里的疑问句要提前成了have you come back？这里的have就是助动词需要提前相当于does。do