英和和英

be used by

used up

being used to

be of use

I have finished my business

I am through with my business

I am quit of the business.

to be in use

come into use

put to use

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

to get quit of one's business

to be used up

I am engaged.

put to use

become used up

During use

used as expletives

I have some business to attend to

I have something to do

I am engaged.

to carry out one's tasks to completion

being for someone's use

to be used for a certain purpose

to take care―be careful

to take care of―be careful of―give attention to―anything

avail oneself to

established usage

to be out of use

come [be brought] into use