fell asleep, was falling asleep, covered (with), filled (in)
Том то засыпал, то снова просыпался.
Tom kept falling asleep and then waking up again.
Ты когда-нибудь засыпал во время собрания?
Have you ever fallen asleep during a meeting?
Я много раз засыпал в классе.
I fell asleep in class many times.
Он засыпал норку землёй.
He covered the hole with earth.