effort作精力可数吗

effort表达不同意思时既是可数也是不可数。
不可数：表示力量和精力。
I can carry it without effort、
Its a waste of time and effort、

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。