Usages of đã
Gia đình tôi đã rất vui khi gặp bạn.
My family was very happy to meet you.
Hôm qua, An đã ngủ rất muộn vì xem phim.
Yesterday, An slept very late because he watched a movie.
Elon.io is an online learning platform
We have an entire course teaching Vietnamese grammar and vocabulary.