Mom's shoes is not new敢肯定句和否定句

答案：
1.mom's shoes are not new(shoes为复数）
肯定句：mom's shoes are new.
句子本身为否定句.疑问句为：are mom's shoes new?
1.my desk is clean
否定句：my desk is not(isn't) clean.
疑问句：is my desk clean?
2.this is a long ruler?
否定句：this is not(isn't) a long ruler.
实际上句子本身除掉问号就是肯定句.疑问句应该是：is this a long ruler?

1、Mom's shoes is new.
2、my desk is not clean. Is your desk clean？
3、this is a long ruler. this is not a long ruler.

肯定：Mom's shoes is new。/否定：Mom's shoes is not new
否定：my desk is not clean/疑问： Is my desk clean?
肯定：this is a long ruler,否定：this is not a long ruler

my desk is not clean.
Is my desk clean?
this is a long ruler.本身就是肯定句
this is not a long ruler.
Mom`s shoes is new.肯定句

Mom is shoes is new(肯定句)
Mom is shoes is not new(否定句)
My desk is not clean(否定句)
Is my desk is clean?(疑问句)
This is a long ruler.(肯定句)
This is not a long ruler.(否定句)
我想说你写的第2句是错的...

（Mom's shoes is not new是否定句）
（My desk is clean的否定句是：My desk isn't clean. 疑问句是：Is my desk clean?)
（this is a long ruler. 本身就是肯定句。否定句是：this isn't a long ruler.）

my desk is not clean
Is my desk clean?
this is a long ruler
this is not a long ruler