英和和英

being used to

used up

be used by

come into use

to be in use

to be used up

become used up

to send one on an errand

to use something up

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

to get quit of one's business

I have finished my business

I am through with my business

I am quit of the business.

Use it as...

be of use

to waste

to carry out one's tasks to completion

to send （a messenger）

to be out of use

to use something

to use something

I am engaged.

to do one's business―attend to business

to be enough

I have some business to attend to

I have something to do

to use much of

put to use

put to use