tent?英语tent能加s吗?例句2中的put up their tent不加s?

表示复数名词时可以加s.
tent
n.
1.帐篷,帐棚
Tents are used by campers and by soldiers in the field.
露营的人和战地的士兵用帐篷.
Before it got dark the campers put up their tent in a field.
天黑前,野营者在地里搭起了帐篷.
2.住处,寓所
3.【摄】(户外用的)携带暗室
4.(医疗等用的)帷幕;帐篷状物
vi.
1.住帐篷;宿营
2.暂时居住
vt.
1.用帐篷遮盖
2.使在帐篷里住宿

可以啊~着是帐篷的意思啊~