I believe forgiveness is a key to you unhappiness这句话是不是有问题啊?

I believe forgiveness is a key to you unhappiness这句话是不是有问题啊? This is a key to opening this door这句话有问题吗? no matter you believe it or not,but I believe.这句话是不是有语法错误啊?应 I want you back 这句话是不是有问题啊 Is there a limit to forgiveness? what you believe is yours to decide......这句话有语法错误吗? what do you think is the key to the trend?这句话怎么翻译? You're more than a shadow,I've just to believe 这句话出自哪里?电影or歌 I believe with you ,这句话对吗? Do you have the key to _____blue car?I think ________ key is I have a key和 I have got a key这两句话都正确吗? My name is Remco,I saw your profile and believe you to be a