when did you put the pizza in the oven.用do是對(duì)的,因?yàn)檫@句話里有實(shí)義動(dòng)詞put,所以問句中要靠助動(dòng)詞do來變化.
若句子中沒有實(shí)義動(dòng)詞,那就一定有be動(dòng)詞.when are you putting the pizza in the oven？這個(gè)可以嘛不可以。因?yàn)檫@句話里有實(shí)義動(dòng)詞put，所以問句中要靠助動(dòng)詞do來變化。那能再請(qǐng)問一下什么時(shí)候是用when are you 。。。。。嗎？when are you going to put the pizza in the oven這個(gè)算嗎when are you going to put the pizza in the oven這個(gè)對(duì)。