Question

1.there is a picture on the wall改为否定句 2.there is a cat behind the door改为复述形式

Answer 1

1.There isn't a picture on the wall.
2.There are some cats behind the door.

否定句要点：be动词后面加not。
如果是行为动词，加上助动词，后面添not

复数：is变are ，单数变复数，其余不变。

求采纳！谢谢
【俊狼猎英】

Answer 2

1.There isn't a picture on the wall.
2.There are some cats behind the door.

如果不明白，请再问；如果对你有所帮助，
请点击本页面中的“选为满意回答”按钮，谢谢！

追问

there is a black car in front of his house改为一般疑问句

追答

Is there a black car in front of his house?

Answer 3

你好

1.there isn't a picture on the wall
2.there are some cats behind the door

若有疑问及时追问，如满意请点击下面的“选为满意答案”按钮，谢谢！O(∩_∩)O

Answer 4

There isn‘t a picture on the wall.
There are some cats behind the door.

Answer 5

1. There isn't a picture on the wall.
2. There are some/two cats behind the door.