shouldbesuretodoHeshouldbesuretowashhishand.对吗?我觉得是Heshould（makesureto)washhishand.should和be能一起用吗?

Question

should be sure to do
He should be sure to wash his hand.对吗?
我觉得是
He should （make sure to) wash his hand.
should和be能一起用吗?

Answer 1

should和be能一起用.
后一种表达法更为确切.
Be sure意思是已经sure了：
I am sure you will do well on the exam if you study hard.
Are you sure he's the guy you were talking about?
Make sure强调过程,从不sure到sure或从sure到更sure的过程:
Make sure you will bring your umbrellas tomorrow in case it rains.
I will make sure that everyone gets a book.