That is ruler改为复数句

That is ruler改为复数句 Is that a ruler?(改为复数句） Is it your ruler?改为复数句 That is a ruler作复数句 This is his ruler(改为复数句) That is my key(改为复数句) These are his That is her ruler改为同义句 1.Those are my books改为一般疑问句2.This is his ruler 改为复数句 3.That That's a ruler.对 a ruler 提问.Is this an apple?改为复数句子. That is her ruler.(改为否定句,疑问句和回答) is that her ruler?改为同义句Is什么ruler什么 is this your ruler? 改为复数句 Are these her erasers?改为单数句 ls this your ruler改为复数句