That is a ruler作复数句
That is a ruler作复数句
Is that a ruler?(改为复数句)
That is ruler改为复数句
That is a ruler 变为否定句
That's a ruler.对 a ruler 提问.Is this an apple?改为复数句子.
Is that his ruler(作肯定回答)
That is a ruler 回答
This is his ruler(改为复数句) That is my key(改为复数句) These are his
Is it your ruler?改为复数句
this is a ruler.改复数
lt is a ruler(改为复数)
this is a ruler 改为复数