动词的原形就是动词的本来面目,没有进行任何的改变.如;study,learn...
句子中的谓语动词用什么形式取决于句子的时态和主语.一般过去时态的否定句和疑问句要用谓语动词的原形.:I
didn't have anything this morning.
Did you go to see a film yesterday?
一般 现在时态的否定句和疑问句中要用动词的原形.如;
She doesn't like apples.
Do you want to be a teacher?
一般将来时的肯定句,否定句和疑问句中也用动词原形.
I will go to Beijing tomorrow.
We won't swim this afternoon.
Will you finish your homework in an hour?
It is going to rain.