1.admit doing 和admit having done 到底有没有区别 2.in want of 和in ne

admit doing sth是承认去做某事,但尚未做
admit having done sth是承认已经做了某事,已经完成
in want of表示“需要,缺少”如：I am in want of your document.一般指具体的东西；
in need of与in want of 意思相近,也是“需要”的意思,但可以指具体的东西,也可以指抽象的东西,比如I am in need of your love.