There is a cat in the tree.(变一般疑问句) 2.There are some flowers in the garden. (变否定句) 3.There is some juice in the glass.(变一般疑问句) 4. They can go to school on foot.(变一般疑问句) 5.I can see some coffee in the coffee-pot.(变否定句) 6.The boy can make the tea.(变一般疑问句)