--This is for you .---You ____have I don't know how to thank you.答案是needn't还是shouldn't --This is for you .---You ____have I don't know how to thank you.有的说答案是:needn't 你不用给我准备这个的 shouldn't 带有命令口气，人家给你一礼物，你不高兴的说“不准给我礼物”。有的说答案是:应该是shouldn't 不应该，needn't是不需要 到底哪个正确
问题描述：
--This is for you .---You ____have I don't know how to thank you.答案是needn't还是shouldn't
--This is for you .---You ____have I don't know how to thank you.
有的说答案是:needn't 你不用给我准备这个的 shouldn't 带有命令口气，人家给你一礼物，你不高兴的说“不准给我礼物”。有的说答案是:应该是shouldn't 不应该，needn't是不需要 到底哪个正确
答
shouldn't have done sth表示本不应该做某事却做了。本题中理解为，你本不该给我的，但你却给了我，真不知该如何感谢你。
答
shouldn't have done sth表示本不应该做某事却做了
答
应该是shouldn't 不应该,needn't是不需要
答
needn't 你不用给我准备这个的
shouldn't 带有命令口气，人家给你一礼物，你不高兴的说“不准给我礼物”