what did he后面为什么是加used to do不是use to do

what did he后面为什么是加used to do不是use to do 为什么过去式后面加不了过去式.比如what did he do last week.为什为什么过去式后面加不了过去式.比如what did he do last week.为什么不是did he did.为什么否定句加do,比如说he like soccer（否定句）he don't what he did surprised us中surprised是什么词性 What he did ___(使震惊) all of us. Mr.Wang does what he can to do us improve our English.为什么can后面要加to do He did very ——.后面加形容词还是副词? It is obvious t everyone that he is quite honest what he is telling us.为什么是 to 和 in What he told us was more of an illusion than a reality为什么要more后面加of.than后面怎么没有of the doctor did what he could ____the dying man 为什么里面要加to save 为什么不加save.could后面是不跟原型嘛?急 He asked us to watch carefully everything____ he did in class.A.whoB.thatC.what I did my work and call my friend 后面为什么要加动词原形?call 这一个为什么是原形? 7.________nothing to do with us.A.What she did have B.What she did is C.What did he do has D.What 为什么Where did you live?的后面不加in,而What house did you live 后面要加in? The doctor did what he could （to save）the child.为什么是to save?而不是是save? 翻译：（ ）（他说了些什么）to the class teacher?为什么是What did he say过去式? He went to church to pray last night.went后面为什么加to.church后面为什么是to pray. What did he say? What music did he