too much用于表示程度几乎、大致了解。也可表示时间，意为经常、时常。too many用作形容词时后接复数名词，表示许多同样的人或物但数目不明确。用作主语时，其谓语动词要用复数形式。常用于否定句中。
too much举例：1、Using too much water could spread the stain.用水太多可能使污迹扩散。2、I think the problem can be got over without too much difficulty.我认为这个问题不太难解决。
too many举例：1、You made too many mistakes.你犯的错误太多了。2、The TV play was interrupted by too many commercials.那个电视剧中插入的广告太多了，频频被打断。3、There are too many errors in your work.你的工作失误太多。