have
to语气强烈，其他的就是时态和第几人称的问题
have
to,doesn't
have
to,didn't
have
to三个都是
“没有必要做”
的意思只是在时间和对象的使用上有区分；don't
have
to用于一般现在时的复数或对本人的叙述上，doesn't
have
to用于一般现在时的单数人称，而didn't
have
to则用于过去时中（此时不用管单复数）。
英文mustn't,don't have to,doesn't have to,didn't have to有什么区别...
mustn't是“禁止”的意思，凡用此的后面一定跟绝对不能或绝对不允许做的事。don't have to,doesn't have to,didn't have to三个都是 “没有必要做” 的意思只是在时间和对象的使用上有区分；don't have to用于一般现在时的复数或对本人的叙述上，doesn't have to用于一般现在时的单数人称，...
must和haveto的异同?mustn't和don'thaveto的异同
must ,have to 不得不 两者没有严格的区别,语气上有不同 must 主观 have to客观 mustn't 和 don't have to 意思不同 mustn't 不可以,不允许做某事 don't have to 不必要做某事 eg:you mustn't go out now.你现在不可以出去 you don't have to go out now.现在可以不用出去.
...t,be allowed to,have to,don't have to的区别
1.can表示“能够”，can't是“不能” 2.must表示“必须，应该”，mustn‘t是“禁止”恰恰相反 3.needn't表示“不必要的” 4.be allowed to表示“被允许做某事” 5.have to表示“不得不，必须” don't have to 表示“不应该做某事”6.must和have to都表示“必须”，must强调主...
don't have to,musn't,didin't的区别
您好！三者后面都接动词原形。don't have to = needn't 不必 ，mustn't + do ,表示禁止，不允许。didn't + do ,表示行为动词的过去时。 望采纳！谢谢！
mustn't ,can't, shouldn't, don't have to的区别(具体)
mustn't 绝对禁止 can't 不能，不可以 shouldn't 不应该 don't have to 没必要
can can't must mustn't have to don't have to的区别
1.can表示“能够”，can't是“不能” 2.must表示“必须，应该”，mustn‘t是“禁止”恰恰相反 3.needn't表示“不必要的” 4.be allowed to表示“被允许做某事” 5.have to表示“不得不，必须” don't have to 表示“不应该做某事”6.must和have to都表示“必须”，must强调...
must和haveto的异同?mustn't和don'thaveto的异同
(此句如果用have to也是可以的，但是语气中充满了强制性。）否定句的差别很大，mustn't表示禁止，意思是不可以，而don't have to表示不是非...不可，未必，如 You are a student. You mustn't spend too much time playing games.It's only a suggestion. You don't have to take it....
must和haveto的异同?mustn't和don'thaveto的异同
must=必须、一定（没有选择），have to=只能（只有这一个选择）must not=必须、一定不能（没有选择), do not have to=不是只能（不是只有这个选择）
must 和 have to 的异同?mustn't 和 don't have to 的异同?
1.can表示“能够”，can't是“不能”2.must表示“必须，应该”，mustn‘t是“禁止”恰恰相反 3.needn't表示“不必要的”4.be allowed to表示“被允许做某事”5.have to表示“不得不，必须”don't have to 表示“不应该做某事”6.must和have to都表示“必须”，must强调主观看法，have to...
don't must 和don't have to 的区别
must的否定形式通常是mustn't，没见过*don't must。must'nt表示禁止；don't have to表示不必。想必你能理解二者情态语气的不同。比如：You mustn't do that! 你万不可如此行事！（因为禁止你那样做）You don't have to do that. 你不必那样做。（因为你没有受制那样做）既然提出“修改建议”...
