this is my book.把此單數句子變為複數句子 句中的物主代詞my需要變化嗎 是these are my books還是these are our books？

this is my book.把此單數句子變為複數句子 句中的物主代詞my需要變化嗎 是these are my books還是these are our books？

應該是These are my books.
單數句子變為複數句子的要求是改變主謂賓的形式
但是對於定語，補語，或狀語等不要求改變，
my修飾的是books，不在改變範疇之內.

將以下句子改為複數形式，謝謝1.this is my case. 2.my dress is green. 3.that's my suit.
4.Is this your passport？5.Is your friend Russian？6.here it is.

These are mine cases.
Mine dresses are green.
Those are mine suits.

變成複數形式It is a greendress.Myblouse is new.I’m ateacher.Thisis you case.

They are green dresses.
Our blouses are new.
We are teachers.
These are your cases.