the boy went to bed after his mother came back home改同义句the boy __ __to bed __his mother came back home

the boy went to bed after his mother came back home改同义句the boy __ __to bed __his mother came back home
the boy went to bed after his mother came back home改同义句
the boy __ __to bed __his mother came back home

the boy went to bed after his mother came back home改同义句the boy __ __to bed __his mother came back home
didn't go until

the boy __didn't _go_to bed _until_his mother came back home

the boy didn't go to bed until his mother came back home