YOU SAID:
the pen is great because it can write
INTO JAPANESE
ペンは書くことができるので素晴らしいです
BACK INTO ENGLISH
The pen is great because you can write
INTO JAPANESE
あなたが書くことができるので、ペンは素晴らしいです
BACK INTO ENGLISH
The pen is great because you can write
That didn't even make that much sense in English.