可数：to do sth 努力,奋斗.
Your effort is bound to be successful.
effort指“努力”时，是抽象名词，不可直接用于make后。只能以aneffort，efforts，every efforts等形式出现;
表示相反的状态时，用without effort或without great effort中，注意是单数effort;
effort可用于以下句型中：Effort has been made to...(不定式)，Effort has been directed to...(介词)或make special effort to...(不定式)等。