My family is not very rich, but we live happily together.[wrong]
代名詞 “we” 在這裡未定義的。它可以是 ”您和我” 或 ”任何人和我”…。
可以改成
(1)My family members are not very rich, but we live happily together.
或
(2)My family is not very rich, but my family members live happily together.