keep up an act
устраивать спектакль, претворяться
"Don't try to keep up an act; I know what you are capable of."
Другие идиомы:
- keep (something) under one's hat
- keep one's opinions to oneself
- keep one's nose out of (something)
- keep good time
- keep (someone) from (doing something)
- keep up
- keep cool
- keep one's head down
- keep one's head above water
- keep from (doing something)
- keep tabs on (someone or something)
- keep an open mind about (something)
- keep a close watch over (someone or something)
- keep off (something)
- keep (someone) posted