有关musthaveto等的问题怎么区分他是主观还是客观啊.比如1thedoctorsaidthatsuchawalkbyhispatienteveryday是用Must还是Haveto还有关于Must表推测的用法1、tomhadhisshirtwashed,butitdidn'tfithiman

Question

有关must have to等的问题
怎么区分他是主观还是客观啊.
比如
1 the doctor said that such a walk ____by his patient every day
是用Must 还是Have to
还有关于Must表推测的用法
1、tom had his shirt washed,but it didn't fit him any more.the shirt _______
A must have shrunk Bmust be shrinking
3、if you smoke in a non-smoking section people______
A must object Bwill object
用A 理解为must表示推测为啥不可以.
注意呃 我问的是为什么 还有医生的那道题答案是have to

Answer 1

must是主观,是自己或自愿去做的
have to是客观,是被迫或迫使的
1.have to（医生这句话）
2.A
3.B