何况 (hé kuàng): ให้คนเดียว

He doesn't even clean his own room, let alone the whole house.

Even the teacher doesn't recognize this character, let alone the students.

He can't even solve the simplest problem, let alone such a difficult one.

We have to work overtime even on weekends, let alone on weekdays.

Even adults can't walk such a long distance, let alone children.