句型转换,否定句否定句:1.He is from the USA.2.She comes from England.3.He likes apples,too.4.They live in Beijing.5.There is a big dog in the room.6.He can carry the box.7.I have a new book.8.Li Ming has a little dog.9.I know him.10.I think so.

1. He is not from the USA.
2. She doesn't come from England.
3. He doesn't like apples,too.
4. They don't live in Beijing.
5. There isn't a big dog in the room.
6. He can't carry the box.
7. I don't have a new book.
8. Li Ming doesn't have a little dog.
9. I don't know him.
10. I don't think so.

肯定句转换成否定句，只要在实意动词前加助动词的否定形式或直接在情态动词后加not就可以了。但要注意人称单三形式。所以下面的句子可以改为：
1.He is not from the USA.
2.She doesn't come from England.
3.He doesn't like apples,too.
4.They don't live in Beijing.
5.There is not a big dog in the room.
.6.He can not carry the box.
7.I don't have a new book.
8.Li Ming doesn't have a little dog.
9.I don't know him.
10.I don' t think so.

1.He is not from the USA.
2.She doesn't come from England.
3.He doesn't like apples,too.
4.They don't live in Beijing.
5.There is not a big dog in the room.
.6.He can not carry the box.
7.I have not a new book.
8.Li Ming has not a little dog.
9.I don't know him.
10.I don' tthink so.