1 you mustn't come home late.you must be home at half past ten.这句中的at能不能改为by 为什么?2 be home 和 get home 的区别3 can i have the key to the front door please?中为什么用to 而不是用的其他

英语 You mustn't do anything h------ to the environment. You mustn't play on the crossing 和 You can come and sit here 的祈使句 变祈使句1)You must come here.2)Please go there.(not)3)You mustn't write on it.4)You will sit there. You ____ come late.Classes begin at eight.A.needn't B.mustn't C.can't D.aren't YOU MUSTN'T CATCH THE BIRDS.LOVE THEM OR THEY WILL NEVER COME BACK. May I come in?No,you ___.A.mustn't B.needn't C.may not D.aren't May I come in? No, you ___. A. mustn't B. needn't C. may not D. aren't ---Must we come back before five?--No,you___.You may come back before six if you likeA.mustn't B.needn't C.can't D.may not You mustn't forget______your dictionary when you come here tomorrow!(A)to bring(B)bring(C)to take(D)take you mustn't forget_____your book when you come tomorrowA to bring B bring C to take D take You mustn't tellyour mother,_________ you? would you come back later next time?no,i ___.a.shan't b.wouldn't c.won't d mustn't 选C为什么不选B? must l come out four o'clock?oh,no,you( ) A don't B mustn't Cdon't have to Dcan't — Must I come back in a week?— Oh,no,you ____.A.don't B.mustn't C.don't have to D.can't You ___ come tomorrow .I can do it by myselfA needn't B mustn't C can't D shouldn't You mustn't smoke here.(改为祈使句) you mustn't walk ong the grass. you mustn't cross the road now!