怎么分辨什么是谓语

We want to make the room clean.请问什么是谓语，是want to make，还是make?

He promised not to hurt him.请问什么是谓语？多谢！

 want是谓语动词， to make the room clean是动词不定式短语作 want 的宾语。

promised 是谓语动词，not to hurt him是动词不定式的否定式短语作 promised 的宾语。