happy的副词和名词怎么写

　　I said I'd go, just to keep him happy.

　　我说过我要去只是为了让他高兴。

　　I'm not happy with his work this term.

　　我对他这学期的表现不满意。

　　Every time I hear that song I feel happy.

　　我每次听到那首歌都感到很愉快。

　　We led a poor but happy enough existence as children.

　　我们儿时的生活虽然贫穷却过得很愉快。