to后面加什么时态

当to作为动词不定式的标志时，后面加动词原形，作为介词的词性时，用v—ing的形式。

例句

Whos going to break it to her?

由谁来把这事告诉她呢？

Its a constant struggle to try to keep them up to par.

要使他们达到标准是一场持久战。

She went to her room to unpack。

她回到自己的卧室打开行李取出衣物。

Rice aspired to go to college。

赖斯渴望上大学。

I wish to speak to the manager。

我想跟经理说话。

It pleased him to talk to her。

和她谈话让他高兴。