是你的黑色钢笔 Your black pen ; Are you a black pen

这就是黑色钢笔 That is a black pen

这是黑色钢笔 This is a black pen

这些都是黑色钢笔 These are black pens

黑色钢笔墨水字迹 black ink handwritings

黑色的钢笔丢失了 Black pens lost ; Black pen is missing ; Lost black pen ; Black ink pens lost

一支黑色的钢笔 A black pen ; Black fountain pen

是他黑色的钢笔 Is pen his black