1.I have a desk and a chair（用He做主语改写句子）2.There are twelve studens over there（对画线部分提问,画线部分是“twelve”）3.l am writing now （改为一般疑问句）
问题描述：
1.I have a desk and a chair（用He做主语改写句子）
2.There are twelve studens over there（对画线部分提问,画线部分是“twelve”）
3.l am writing now （改为一般疑问句）
答
He has a desk and a chair
How many students are there over there
Are you writing now?
答
1.He has a desk and a chair.
2.How many students are there over there
3.Are you writing now
不明白的再问哟,请及时采纳,多谢!