up to什么意思

up to
多达
I can take up to four people in my car.
我的汽车最多能坐四个人。
直到
Up to now he's still quiet.
他直到现在仍保持沉默。
在于…, 取决于…
This is up to you.
这件事取决于你。
能胜任
He's not up to the work.
他不能胜任这件工作。
做…, 忙…
What's he up to?
他做什么呢?

up to
1. 忙于
What are you up to?
你在忙什么?

题外话:
be up to

由某人决定
例句与用法:
I feel a bit out of form today; I'm afraid my tennis won't be up to your standard.
我今天略感不适，恐怕我的网球水平达不到你的标准。
The little girl ran a temperature and had to be up to bed.
那个小女孩发烧了，得让她上床躺着。
Where's that naughty child now? I'm sure he'll be up to no good wherever he is.
那调皮孩子哪儿去了? 我看, 他到哪儿也做不出好事来.

up to
1.Occupied with, especially devising or scheming:
忙于（尤其是策划和密谋）：
a prowler up to no good.
四处寻觅，图谋不轨的家伙
2.Able to do or deal with:
能做…或处理（对付）…：
didn't feel up to a long drive.