四年级英语专项练习 把下列句子改为否定句：
1.I am hungry.
2.He is thirsty.
3 They are in the classroom.
4.It's on the ground floor.
5.These are their lunchboxes.
6.I like a cup of tea
7.You like hamburgers.
8.He likes the camera.
9.They like English.
10.Ptere likes cakes.