They are some pens,some books but cards

They are some pens,some books but cards what are they are pens Are Tom's pens on his desk?Yes,they are .是否正确,并作注解 These are our pens .They are（）. 陈述句变一般疑问句 They often sweep the floor My father often read some books.There are some pens i 陈述句变否定句 They often sweep the floor My father often read some books.There are some pens ___these your pens -----Yes,they are .填空 连词成句：are pens whose they they are pens改为复数句 Are they your pens? 单复数互换 They are pens(改为否定句） there ____ some pens under the chairs a.is b.are c.three 选哪个,为什么?s...there ____ some pens under the chairs a.is b.are c.three 选哪个,为什么?some 修饰什么? They are my colour pens.(变成一般疑问句）-------they-------colour pens? 请问一下whose pens are these回答除了they are her pens是否还能回答成these pens are her或these are her pens? Are there some pens in the bag?改为一般疑问句,否定句 they are English book对English book提问帮帮忙 There are some water and two pens on the desk. There are some pens on the desk.是什么意思? There are some pens (in the pencil case) 划线提问