若无其事英语

1. as if nothing had happened; with perfect composure2. to carry it off well; to act as if nothing were on one's mind

你好！他装作若无其事的样子He pretend as if nothing had happened

“装” 的话用pretend更生动些, He pretend （as if ）nothing have happen. as if 可以省略，故加了括号，注意动词时态根据上下文语境自己调整下。

他装作若无其事的样子: He behaved as if nothing had happened.