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to spy on
[phrase form: spy]
01
to secretly observe someone or something with the intention of gathering confidential or hidden information
Grammatical Information
Composition
phrasal
action verb
regular
inseparable
particle
on
base verb
spy
present tense
spy on
3rd person singular
spies on
present participle
spying on
past simple
spied on
past participle
spied on
Examples
The detective decided to spy on the suspect to gather evidence for the case.
