为什么I want to have a try.要加to

题目

为什么I want to have a try.要加to
而Let me have a try.不用加to

答案

to have a try 是动词不定式短语做宾语补足语.
当谓语动词是Let,see, hear 的时候,做宾语补足语的不定式就要省略to：
I saw him go into the shop.
We heard the girl sing just now.