this is my book.寫出下列句子的複數形式 還有Is that his uncle Is she your friend？ yes，it is. this is my pencil case.

this is my book.寫出下列句子的複數形式 還有Is that his uncle Is she your friend？ yes，it is. this is my pencil case.

this is my book.- These are my/ourbooks.Isthat his uncle - Are those his/their uncles Is she your friend？- Are they your friends yes，it is.- Yes，theyare.thisis my pencil case.- These are my/our pe…

Is this your book？單複數句互變
That's his dictionary.
These're my pencils.
Those are baseballs.

Are those your books？
Those are our dictionaries.
This is my pencil.
That's a baseball.

Is this your English book？單複數互換

Are these your english books