The police is running after a thief,为什么用after

The police is running after a thief. The police 后加is 还是are how poor the police is还是are? The police 后加is 还是are One of the easiest ways to keep healthy is to do jogging:Jogging is the name for a very siow runnin the police is looking for the lost boy where is the police station为什么加the the police is running after the thref 哪个错了 The murderer is said (catch)by the police last night 英语翻译He is the police who caught the thiefHe is the police who has caught the thief哪个对？ the hotel is behind the police station there be句the hotel is behind the police station there be句型 The police _____coming overA.is B.are顺便讲解一下police 用法 一类人 比如 the police the doctor 后面是跟单数形式还是复数形式the doctor is .are.the police claim...the police claims... the police is looking for him.（改错） The police [ ][know] who he is.填适当形式 The police is running after a thief,为什么用after the police _（know） who he is there is a police car by the street