лечь

fairly common #1197B2

verbperfective imperfective is ложи́ться

1.
to lie down, to lie (down on sth)
Мне надо лечь и отдохну́ть.
I need to lie down and rest.
Perfective of ложиться.
2.
to go to bed, to turn in
Мы легли́ спать после полу́ночи.
We went to bed after midnight.
Usually лечь спать.
3.
to fall (on sth), to settle, to descend
На его лицо́ легла́ тень.
A shadow fell on his face.
4.
to fall (on sb), to be placed (on sb)
Вся отве́тственность легла́ на меня́.
All the responsibility fell on me.
5.
(rare) to drape, to fall (of fabric)
Ткань легла́ краси́выми скла́дками.
The fabric fell in beautiful folds.

Examples

Вчера́ не успе́л отве́тить. Рано лёг спать.
Yesterday I didn't get a chance to answer. I went to bed early.
Ляг на живо́т.
Lie on your stomach.
Ма́чта слома́лась, и наше су́дно легло́ в дрейф.
The mast broke and our ship went adrift.
Он рано лёг спать.
He went to bed early.
Она легла́ на траву́.
She laid herself on the grass.
Я лёг спать в по́лночь.
I went to bed at midnight.
Я хочу́ сего́дня лечь пораньше.
I want to go to bed a little earlier tonight.
Мне нужно лечь спать до полу́ночи.
I need to go to sleep before midnight.

Imperative
ты	ля́г
вы	ля́гте

Verb	Prefix	Meaning
лечь	-	to lie down; to go to bed; to fall (on sth); to fall (on sb); to drape
зале́чь	за-	to lie down; to lie low; to go into hibernation; to lie; to form deeply
нале́чь	на-	to lean on; to apply oneself; to press
обле́чь	об-	to clothe (dress)