YOU SAID:
I don't think I've ever sat in this chair before
INTO JAPANESE
この椅子に座ったことは一度もないと思う
BACK INTO ENGLISH
I don't think I've ever sat in this chair
INTO JAPANESE
この椅子に座ったことがないと思う
BACK INTO ENGLISH
I don't think I've ever sat in this chair
You should move to Japan!