为什么是Who bought a new car?而不是Who did buy a new car?

为什么是Who bought a new car?而不是Who did buy a new car? 为什么是Who bought a new car?而不是Who did buy a new car? who bought a new bike yesterday?疑问句中动词不是用原型嘛?为什么这里用bought而不是buy? Who bought you thiis new football?--My father__.A.dose B.do C.did D.done 提问T bought a new car last week.what type/to buy?回答为什么是what type did you buy?而不是what type buyed? He wanted to bought a new book. My mother bought a new b_____ suit He bought a new car是什么时态 cool just bought a brand new WH问句的被动语态句形转换. who bought the sweater?改为被动句形.为什么是Whom was the sweater bought by?而不是who was the sweater bought by?呢 tims father bought him a new bike.该为一般疑问句 He bought a new house last year.该为否定句 英语英语题Tommy bought a pair of new gloves last week .but he can't find __today A them B it为什么是A a pair不是单数吗 He is a new comer,_____i believe will be liked by everyone.a.whom b.that c.who d.which请问为什么是C不是A呢? Who will teach _____ oral English next term?Can it be a new teacher?(为什么是填your不是填you) He hasn't bought a car for 3 years,为什么用bought这里注明：用bought是正确的.为什么是正确的? The new mobile ____he bought last week is called iphone 4 .It's expensive .A what B who C which D when答案是C 为什么? Tom has bought a new computer.She has bought a new one,tooTom has bought a new computer.______ ________ ________改为同义句