当妈妈走进房间时,小男孩假装已经睡着了(英语翻译,用petend)

The little boy pretended to be asleep when his mother came into the room.

是pretend吧，When mother entering the room, the littleboy pretended to be asleep.

The little boy pretended to be asleep when his mother entering the room.

when mother entered the room,the little boy pretended to have slept.