1.troop作名词时意思是“部队”,转化成动词意思是“成群结队地走”,指众人集结成队去做某一件事情(多指走路),还可指成群结队地聚拢来或散开,常表示一个整体,其主语一般为复数形式的名词或代词。
2.troop多用作不及物动词,有时也可用作及物动词。

troop into(v.+prep.)
列队走进… get into (a place) in a line
▲troop into sth
The students trooped into the classroom.学生们列队走进教室。
The children trooped into the yard in single file.孩子们成一路纵队走进院子。
Everyone trooped into the meeting.大家三五成群地去参加会议。

troop out of(v.+adv.+prep.)
成群结队地走出… get out from (a place)
▲troop out of sth
People came trooping out of the theatre.人们成群结队地走出戏院。
School was over and boys and girls all trooped out of the school.放学了,学生们都成群结队地走出校门。

用作不及物动词
▲S+～(+A)
The twelve men trooped downstairs.这十二个人列队走下了楼。
The miners trooped home.矿工们成群结队地回家了。
The satisfied visitors trooped home.心满意足的来宾结队回家了。
The children trooped around the teacher.孩子们聚集在老师周围。
The children are trooping along.孩子们成群而来。
The fourth grade trooped in.四年级的学生列队而进。
The crowd trooped away.人们成群结队地散去了。

everyone虽是单数形式,但具有复数意义,所以也可用作troop的主语。

［词源］＜法语troupe(群,队)

troop作“军队,部队”解时,通常用复数形式,可与较大数字连用,而不与较小数字连用。

The troops swept past.部队疾驰而过。
A hundred troops were killed.一百名士兵阵亡。
A troop of visitors arrived.一群来访者抵达。
He was surrounded by troops of friends.他被一大群朋友围住了。

troops, army, forces, military
参见army条。