not A but B 不是…而是… A與B若為主詞，則動詞以B為主詞。
Not Cindy’s parents but her aunt brings her up. 不是Cindy的父母，而是她的姑姑養大的。(Cindy是由姑姑養大的而不是父母。)
It is not he but you that are to blame.該受責怪的人是他而不是你。
not because ….but because (不是因為…而是因為)
I choose Cindy as my assistant not because she can do better than Mike but she is more considerate and careful.
When you are old, you will find what you really care is not money ,but your healthy.