You don't know shit.

You know so little.

I know exactly what we should do.

I don't know where else to turn.

- You've got to help me. I don't know where else to turn. / Ты должен мне помочь. Я не знаю, куда еще обратиться.

- Why do you go tell the cops what happened? / Почему тебе не пойти в полицию и не рассказать, что произошло?

How long have you known him?

I wish I at least knew his name.

You don't have to know that.

You don't need to know that.

You don't want to know that.

You don't know who to trust these days.

- There are so many people out ther who just try to take advantage of you. / Сейчас так много людей, которые пытаются тобой воспользоваться.

- Right. You don't know who to trust these days. / Точно. Сейчас не знаешь кому доверять.

You don't really know me.

I know my rights.