用作名词，有时可数，有时不可数：
(1) 表示由实践得来的“经验”“体验”等，是不可数名词。如：
Experience is the best teacher. 经验是最好的老师。
You will gain experience in that job. 干那个工作你会获得经验。
(2) 泛指一般意义的个人经历或阅因，也是不可数名词。如：
Experience has matured him greatly. 他经历这些事之后已经成熟多了。
(3) 表示具体的一次经历或体验，为可数名词。如：
It was a very frightening experience. 这是一段令人惊恐的经历。
He had many interesting experiences while traveling in Africa. 他在非洲旅行时，有很多有趣的经历。
表示做某事的经验，其后通常不接不定式，而接 in [of] doing sth。如：
He has had many years’ experience in [of] wheat planting [planting wheat]. 他有多年种小麦的经验。
He has had much experience in [of] this kind of work. 他有丰富的经验做这项工作。
