happy：adj.感到(或显得)快乐的;高兴的;给予(或带来)快乐的;使人高兴的;幸福的;表示祝愿，如Happy Birthday生日快乐、Happy New Year新年好等
比较级： happier最高级： happiest
记忆技巧：happ〔= hap〕机会；运气 + y …的 → 有运气的` → 幸运的
例句：
She wasn't happy with our work and made us start over.
她对我们干的活儿不满意，要我们返工。
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。