They did not need to arrive so early.中的arrive

They did not need to arrive so early.中的arrive they said they did not need any help.同义句 They said they did not need any help.(同义句转换 ）they said they ( )( ) help 英语翻译下面是两段翻译 请高手翻译下Some years ago,industries had more freedom than they have now,and they did not need to be as careful as they must today.They did not need to worry a lot about the safety of the new products that the They must have gone there two days ago,did not they?We must go right now,need not we?二句都有must,为何反义疑问句的句末不一样呢?did not they?与need not we? they need not go home today 不是need to 怎么go前面没有to? I need not to need did not need to need not have 的区别吗它们有什么区别 希望能详细一点 Need not to know Need not to know. Need not to you. need not to know Need Not To Know yesterday /it/ need/ they/ to/ do/ did 最后标点是感叹号!组句 What we need to do is to help others,not to find why they need help是什么意si 英语翻译did not need again to ask me 这个句子这样表达有没有问题? You () tell him the news.They told hi,just now.A.need not to B.don't need to C.need to D.needn't to顺便再问一下,needn't和need not有什么区别? Jim and lily （）（not） need to leave.they must stay（） here