You can't do a certain work with your mind somewhere else.

"Possibly I might find time to do certain work along these lines."

Meanwhile he asked for permission to engage in certain experimental work, simply as a change of air.

It was proposed to carry out certain work and to provide privies.

A man comes here, we don't promise him certain work.

And certain new work makes direct or indirect reference to him.

"She was coming back for certain work to be done?"

Job knowledge measures one's mastery of the concepts needed to perform certain work.

They have heard recipients say that certain work is beneath them, then stay on the rolls for a week or a year.

The cost of this and certain other work was £3,842 10s 11d.