please请 或动词 取悦/使喜欢/使高兴
pleasure 名词快乐 令人高兴的事
to please
pleasant形容词 愉快的 （可作表语,可修饰名词）
pleasantly副词 愉快地（可修饰形容词、动词等）

The school principal found the party very _____.（very 为副词要修饰形容词,所以为pleasant）
He said it was a great ____ to meet Mr. Billy..（great修饰名词,此空须填名词 pleasure）
His presence ____ the Billy’s very much （presence出席的意思,此空须填动词过去式pleased）
They were ____ surprised to find that he understood Portuguese.（此空要修饰形容词urprised,所以要用副词pleasantly）