Once having opened it, he had been on constant watch for any changes in local policies that might further his enterprise.

"We're keeping a constant watch on the girl and her parents, though I'd appreciate it if you didn't say anything about that to anyone."

This meant it was impossible to keep a constant watch on Japanese activities.

Against these it is necessary to keep constant watch.

Ann was keeping a constant watch, to make sure they were alone.

The English were forced to keep constant improved watch after this.

It could not be a constant watch; that would have been noticed.

A woman in our village keeps a close, constant watch on the press cars that pass through my hands.

"We have it under constant watch, but so far there has been no suspicious activity."

They were kept under the constant watch of armed soldiers.