YOU SAID:
Why can't you help me carry this sofa
INTO JAPANESE
なぜあなたは私がこのソファを運ぶのを手伝ってくれないのか
BACK INTO ENGLISH
Why don't you help me carry this sofa?
INTO JAPANESE
このソファを運ぶのを手伝ってくれないか?
BACK INTO ENGLISH
Can you help me carry this sofa?
INTO JAPANESE
このソファを運ぶのを手伝ってくれませんか。
BACK INTO ENGLISH
Will you help me carry this sofa?
INTO JAPANESE
このソファを運ぶのを手伝ってくれませんか。
BACK INTO ENGLISH
Will you help me carry this sofa?
That didn't even make that much sense in English.