regretlesser
幼苗
共回答了25个问题采纳率:100% 举报
这是个现在完成时的句子,结构是:have/has + 过去分词( paid),改为一般疑问句时把助动词have/has提前到句首,所以不用do,例如:They have finished doing their homework.一般疑问句:Have they finished doing their homework?
如果是一般现在时的一般疑问句就用助动词:do/does + 主语 + 动词原形,如:They go to school by bus.
Do they go to school by bus?
1年前
2