可數：to do sth 努力,奮斗.

　　Your effort is bound to be successful.

　　effort指“努力”時，是抽象名詞，不可直接用于make后。只能以aneffort，efforts，every efforts等形式出現;

　　表示相反的狀態(tài)時，用without effort或without great effort中，注意是單數effort;

　　effort可用于以下句型中：Effort has been made to...(不定式)，Effort has been directed to...(介詞)或make special effort to...(不定式)等。