1.I know the girl （改否定句)2.The key is on the bed (改否定句)3.I'm a girl (改否定句)4.Tom's brother isn't here (改肯定句）
问题描述：
1.I know the girl （改否定句)
2.The key is on the bed (改否定句)
3.I'm a girl (改否定句)
4.Tom's brother isn't here (改肯定句）
答
1. I don’t know the girl.
2. The key isn’t on the bed.
3.I'm not a girl.
4.Tom's brother is here.
答
I don't know the girl
the key is not on the bed
I am not a girl
Tom's brother is here
答
1.I don't know the girl.
2.The key isn't on the bed.( isn't = is not)
3.I am not a girl.
= I'm not a girl.
4.Tom's brother is here.
答
1. I don't know the girl.
2. The key is not on the bed.
3..I'm not a girl
4. Tom's brother isn here