英和和英

used up

I have finished my business

I am through with my business

I am quit of the business.

be used by

put to use

being used to

to finish one's business―get quit of one's business

to get quit of one's business

Use it as...

I am engaged.

I have some business to attend to

I have something to do

I am engaged.

be of use

to be used for a certain purpose

put to use

to use something

to make use of something

used as expletives

used of conduct

It's being used

come into use

to be used up

capable of being used up

the state of having been made use of

use a trowel on

It is in use.

It's engaged

avail oneself to