简单谓语就是由实意动词构成的谓语;
复合谓语就是除此之外的谓语构成方式;
简单谓语举例:
They are swimming in the pool.
They swim in the pool every day.
They will swim in the pool tomorrow.(无论该动词是什么时态都是简单谓语!)
复合谓语举例:
We have to do the work.(动词+不定式)
He can use the computer.(情态动词+动词原形)
The girl is so beautiful.(系表式)
The dish tastes good.(系表式)