We have four people in the family, my parents, my elder brother and I.
我家有 4 口人,我的父母,我的哥哥和我。
I wonder what makes you unhappy.
我不知道是什么使你不快乐。
He loved to be told that one of his imaginary products was temporarily out of stock and he would faithfully promise to call again at some future date, but of course he never did.