signalling
signalling — verb
1. the form of the verb 'signal' that shows an ongoing action — giving a message or
the form of the verb 'signal' that shows an ongoing action — giving a message or instruction using a light, sound, gesture, or flag
Evelyn was signalling to the other driver that she was turning left.
signalling + to + noun + that-clause
At the busy site, Mr. Chen was signalling to the crane driver to lift the load higher.
signalling + to + noun + to-infinitive (purpose)
The train driver was signalling with a red flag when he spotted a tree on the tracks.
The night-shift nurse was signalling for help when a patient's heart monitor went silent.
文法句型
signalling + noun phrase
signalling + to + noun + that-clause
signalling + prepositional phrase (with/in/by)
用法筆記
This is the British English spelling; American English uses 'signaling' (single 'l'). Both forms are otherwise identical in meaning and use.