If you ~ to sleep, you gradually fall asleep.
It was only when he finally drifted off to sleep that the headaches eased.
PHRASAL VERB: V P to n, also V P
If you ~ to sleep, you gradually fall asleep.
It was only when he finally drifted off to sleep that the headaches eased.
PHRASAL VERB: V P to n, also V P
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012