何も知らないふりをしても無駄だ。の英語

It is no use your pretending that you know nothing.

Pretend you don't know anything.

He knows nothing, and yet he talks as if he knew everything

He talks as if he knew everything while he knows nothing at all.

There are things you're better off not knowing.

As if you didn't know!

As if you knew everything!

of a person, pretending not to know something even though she or he does know it, because knowing it is inconvenient

of an act, feigning ignorance

To put it succinctly, I don't know, and I don't want to know.

I have these little habits (like cracking my knuckles) that show themselves when I least expect it, so I have to watch myself.

I have these little habits that show themselves when I least expect it, so I have to watch myself.

A fat lot you know about it!

to pretend not to know something even though one knows it

One may as well not know a thing at all, as know it but imperfectly.

profess ignorance

a wiseacre

Don't speak like you know. Even though you don't know anything about me.

Some people think they know everything.

No one knows why.

Nobody knows why.

I'm sorry, but people I don't know can't come in.

pretend ignorance

affect genteel ignorance

not knowing or perceiving

There are things you're better off not knowing.

It is dangerous to prejudge what you do not know.

the state of being totally unfamiliar with something

There are few men who don't know that.

There are few men but know that.