我的钢笔是黑色的。

My fountain pen is black.

youdao

我有两枝钢笔。一支是蓝色的，另一支是黑色的。

I have two pens. One is blue. The other (pen) is black.

youdao

我有两支钢笔，一支是红色的，另一支是黑色的。

I have two pens. One is red, the other is black.

youdao

我的钢笔是红色的。他的是黑色的。

My pen is red. His is black.

youdao

我的钢笔是红色的。他的是黑色的。

My pen is red. His is black.

youdao