Your English writing platform
Discover LudwigThe phrase "be on watch" is correct and can be used in written English.
You can use it to talk about keeping a close eye on something or someone in order to make sure no problems arise. Example sentence: The security guard will be on watch throughout the night to make sure nothing suspicious happens inside the building.
Dictionary
be on watch
verb
To switch on.
synonyms
Exact(17)
The three judges found that the Coast Guard's standard of care — which requires that a second crew member be "on watch ir or near the pilothouse," but does not require that two pilots be in the pilothouse at all times when the ferry is under way — should have been applied by the city.
If your doctor does not think you need surgery, he may send you home to be "on watch" for 12 to 24 hours.
She carries a complement of four officers, but since one of them must always be on watch there is room for a guest at the wardroom table, which is how I fitted in.
We had to be on watch.
It's not exactly a holiday – you have to take it in turns to be on watch through the night.
On Monday, customs inspectors had found three visitors to be on watch lists as of 6 p.m.
Similar(39)
Of 44 goals, it found that were on-track, were on-watch, and were off-track.
"That is what we are on watch for.
"There's a few athletes that are on watch and those two names are among them".
He was on watch in the fire room when the first torpedo hit the Utah.
The company has a "negative" outlook on the firm, which means it is on watch for potential further downgrades.
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com