为什么这些句子,一个句子里有两个动词?

题目

为什么这些句子,一个句子里有两个动词?
Do not undertake a project unless you can implement it.
The research suggests that older people fare best when they feel independent but know they can get help when they need it.
She felt she could console the child better than anyone else.
这些都有两个动词,和情态动词有关系吗?

答案

与情态动词没关系!这些句子会有两个或者两个以上动词,是因为这些句子都是从句,也可以换一个角度去理解,像我们的中国语言,在一个句子里不也一样有两个动词吗?比如：直到他回到家我才把书本放下.这个句子里不也一样有两个动词吗?“回到”和“放下”…………