How do you say go to sleep in Russian?

There are a few ways to say "go to sleep" in Russian, depending on the context and formality:

Formal:

* Ложись спать (lozhis' spat') - This is the most literal and formal way to say it.

* Идите спать (idite spat') - This is the plural form, used when addressing multiple people.

Informal:

* Иди спать (idi spat') - This is the informal version of "go to sleep," used with friends, family, and children.

* Спи! (spi!) - This is a simple and informal way to say "sleep!"

* Поспи (pos-pi) - This is a more casual way to say "go to sleep" or "take a nap."

Note: You can also use the phrase "ложиться спать" (lozhit'sya spat') which literally means "to lie down to sleep," and is a more formal way of saying "go to sleep."

Here are some example sentences:

* Ложись спать, уже поздно. (lozhis' spat', uzhe pozdno.) - Go to sleep, it's already late.

* Идите спать, дети. (idite spat', deti.) - Go to sleep, children.

* Иди спать, я тебя люблю. (idi spat', ya tebya lyublyu.) - Go to sleep, I love you.

* Поспи немного, ты устал. (pos-pi nemnogo, ty ustal.) - Take a nap, you're tired.