This is a black and gery shirt.怎么变成复数形式 My blouse is new 同上 I‘m a teacher 同上

This is your case 同上
谢谢了

These are black and gery shirts.
Our blouses are new.
We are teachers.
These are your cases.

你好！ these are black and gery shirt. my blouses are new. we are teachers these are your cases 希望对你有所帮助，望采纳。