as if though

Từ điển Oxford Advanced Learner 8th

as if/as though idiom
in a way that suggests sth
• He behaved as if nothing had happened.
•It sounds as though you had a good time.
•It's my birthday. As if you didn't know!
•‘Don't say anything’ ‘ As if I would! ’ (= surely you do not expect me to)
Main entry: ↑as_idiom