肯定句变否定句
问题描述：
肯定句变否定句
1.I like apples
2.I buy a pen.
3.I am a student.
4.you are my friend.
5.He is my brother.
答
1. I don't like apples
2. I don't buy a pen(?)
3. I am not a student
4. You aren't my friend
5. He isn't my brother