service
1.The typist has offered his services to us（这个打字员已经向我们自荐）和His services are entirely satisfactory（他的服务是完全令人满意的）等句子里必须用复数形式services。
2.下面两句意思相同：
- We are devoted to the service of the people.
- We are devoted to service to the people.
3.比较下面三句：
- He took her into his service.
- She thought she had a right to his service.
- He offered his services to her.
第一句里的his service指“他的被人服务”，全句是“他雇她做他的保姆”。第二句里的his service和第三句里的his services都指“他的为人服务”。
4.比较下面各句：
- He is in service. （他在做工友。）
- He is in the service. （1.他在军队里服役。2.他在这部门工作。）
- He is at service. （跟第一句相同，但比较不普通）
- He is on service. （1.他是现役军人。2.他在某部门工作。）
5.civil service，diplomatic service，customs service等表达方式前面有时有the，有时没有the，比较下面每组里的各句：
- He entered the civil service at twenty-five.
He spent thirty years in (the) civil service. - He no longer belongs to the diplomatic service.
He went to Geneva several times in (the) diplomatic service. - He joined the railway service twenty years ago.
He has had twenty years*experience in (the) railway service.
仔细区别起来，the ... service指“…部门”，…service指“在…部门的工作”。governmental service和military service前面没有the.
