I can't help thinking he's lying,so I can't help to apologize for him.can't help接不定式是什么意思?

I can't help thinking he's lying,so I can't help to apologize for him.can't help接不定式是什么意思?
I can't help thinking he's lying,so I can't help to apologize for him.
can't help接不定式是什么意思?

I can't help thinking he's lying,so I can't help to apologize for him.can't help接不定式是什么意思?
can’t help doing sth．和can’t help but do sth 表示“不得不、禁不住做某事”,
can’t help to do sth．表示“不能帮助做某事”,