He was up to his knees in water.他站在及膝深的水里。

He counted up to fifty.他数到了50。

She came up to me.她来到我身边。

up to now直到现在

up to then直到那时

up to three hours长达三小时

We could go now or later – it's up to you.我们可以现在走, 也可以晚点再走——由你做主。

It was up to him to make it right.他有责任纠正这件事。

He's not up to it.他不能胜任这个工作。

It's not up to your normal standard.它没达到你的正常标准。

It's not up to much.这东西不怎么样。

What is he up to?他在忙什么呢？

He's up to something.他在谋划着什么。