1.You can eat something after you see the doctor.(改为同义句）
You(can't )eat(anything )(until )you see the doctor.
2.Get up early,or you'll be late you see the doctor.(改为同义句）
(If )you(don't )get up early,you'll be late for school.
3.Jim has some good books.（改为否定句）
Jim(doesn't)(have)(any )good books.
4.The boy (in the car)is my brother(就大括号部分提问）
(Which )(one )is your brother?
5.The children are working hard.(改为感叹句）
（How ）（hard ）the children are working!