YOU SAID:
I’m opening the window right now
INTO JAPANESE
私は今ウィンドウを開いています
BACK INTO ENGLISH
I have a window open now
INTO JAPANESE
ウィンドウが開いています
BACK INTO ENGLISH
Window is open
INTO JAPANESE
ウィンドウが開いている
BACK INTO ENGLISH
Window is open
That didn't even make that much sense in English.