用be动词am is are各造5个句
问题描述：
用be动词am is are各造5个句
而且要译成汉语
答
I am reading.我在阅读.I am a student.我是一名学生.I am looking for a ruler.我在找一把尺子.I am glad to see you.很高兴看到你.I am thirteen.我十三岁.He is doing cleaning.他正在做卫生.He is not a student...