tuck someone in
phrasal verb with tuck verb [ T usually + adv/prep ] uk/tʌk/ us/tʌk/
(UK also tuck someone up)
给（孩子）掖好被子;将（孩子）在床上安顿好
to make someone comfortable in bed, especially a child, by arranging the covers around them
Daddy, if I go to bed now will you tuck me in? 爸爸，要是我现在去睡觉你会帮我掖被子吗？
The children are safely tucked up in bed. 孩子们安逸地躺在被子里。