must和have to 可以同时用吗?他两不是同义词吗?

must和have to 可以同时用吗?他两不是同义词吗? 求have to和must的异同,两者可以调换吗?比如I must get up early可以换成I have to have to do和must to do可互换吗? have to和must怎么变成一般疑问句（是have to不是have） Do you have to finish it tiday?这里have to可以换成must或者need吗? You do not have to come everyday.这里have to可以换成must或者need吗? have to 和 must有什么区别吗? 用have to 和must 填空. have to和must的关系是什么,可以通俗的讲吗?主观和客观指的是什么? have to和must哪一个可以用于将来时态? 关于must和have to 能用must have to do sth 吗?