英语求助英语 1.改成疑问句并作肯定否定回答 1 that is a yellow ruler these are her erasers those are

That is a ruler 改成疑问

Is that a yellow ruler ?
Yes, it is .
No, it isn't.
Are these her erasers ?
Yes, they are.
No, they aren't.

Is that a yellow ruler
Yes,it is .
No,it isn't.
Are these her erasers
Yes,they are.
No,they aren't.

is that a yellow ruler these are her erasers those are？
yes，that is no，that isn't