why did not you help them with their English 的中文

why did not you why did not you help them with their English 的中文 Tom should have stayed to help .Why __he?I needed a hand ,you konw.A.did not B.Has not C.had not D.should not Why did you know?Why this world will not perish? Why did you help him so much?改为同义句. why did not you tell me?I () tell you can you tell me why you did not come yesterday还是can you tell me why did you not come Why did not you come last time?怎么回答 why did you not sent me back again Why not __________(ask) your friends to help you? You did not help him at all(同义句转换) 是why did not you had breakfast this morning?还是why did not you have breakfast this morning? why did you not work 和why didn't you work意思一样吗 Does smoking bother you?Why or why not?.would you help me? why did you miss Why did you leave Do not know why,I secretly Fall in love with you,and you did not find. I did not understand why you did speak these words to me这句话的意思