Question

关于情态动词must和have to的区别

Answer 1

情态动词must只有一种形式，而have to根据人称或时态有形式上的变化，如：其单三形式为has to, 过去式为had to。情态动词must和 have to的主要用法及比较如下：

Answer 2

must 表示主观上愿意去做的必须，
have to 表示客观上被迫做。

Answer 3

must 侧重人的主观意识
have to 强调客观情况
The teacher told me that I must finish my homework before four o'clock .
It rains heavily outside ,so we have to stay at home .

Answer 4

must to 重点说的是说话人的心理
have to 重点在客观事实
You have take the next bus, 原因是上一辆车已经走了
You must take the next bus 原因是说话人这么认为

Answer 5

rchase and consumption behaviors.