A phrase: up to something

up to something

1 

as much or as many as a certain amount or number but not more.

The Olympic Stadium will hold up to 80,000 spectators.
a process that can take anything up to ten days.

2 (also up till) 

for the whole of a period until a certain time or date. during the time or period before.

She continued to care for her father up to the time of his death.
We’ve kept our meetings secret up to now.
Up to this point, we have been discussing our long-term goals.
Up to [=until] that time they had been fairly successful.

3 

[in questions and negatives] clever, good, or well enough to do something.

I’m afraid Tim just isn’t up to the job (=he does not have the necessary ability).
You don’t need to go back to school if you don’t feel up to it.
He’s not really up to seeing any visitors.

4 

if something is up to a particular standard, it is good enough to reach that standard.

I didn’t think last night’s performance was up to her usual standard.

5 

(spoken) doing something secret or something that you should not be doing.

The children are very quiet.
I wonder what they’re up to.
He knew Bailey was up to something.
But what? I always suspected that he was up to no good (=doing something bad).