up to

• 非正式短语，表示正在做某事或忙于某事，常用于询问某人在做什么，或表示某人参与了某项活动。

An informal phrase meaning 'doing something' or 'occupied with something,' often used to ask what someone is doing or to indicate that someone is involved in an activity.

1. As far as or untilA2formal

   Indicating a maximum limit or a point in time or space.

   直到

   • You can borrow up to five books from the library.
   • The store is open up to 9 PM.
   • The water came up to my knees.

2. Capable of or good enough forB1informal

   Having the ability or quality required for something.

   胜任的

   • He is not up to the challenge.
   • Is this car up to the long journey?
   • She felt she was up to the task.

3. Doing something (often secretly or mischievously)B1informal

   Engaged in an activity, often one that is questionable or secret.

   暗中从事

   • What are the kids up to in the garden?
   • I think he is up to something suspicious.
   • She is always up to some new project.

4. Dependent on or decided byB1informal

   Being the responsibility or choice of someone.

   取决于

   • It's up to you whether we go or stay.
   • The final decision is up to the manager.
   • Whether we succeed is up to our team.