同义句转换：The boy went to bed after his mom came back.The boy ___ go to bed ___ his mom cane bac

同义句转换：The boy went to bed after his mom came back.The boy ___ go to bed ___ his mom cane bac
同义句转换：The boy went to bed after his mom came back.The boy ___ go to bed ___ his mom cane bac

同义句转换：The boy went to bed after his mom came back.The boy ___ go to bed ___ his mom cane bac
didn't,until

didn't untill

The boy _didn't__ go to bed _until__ his mom cane back.
not....until 直到...才
希望能够帮到楼主