coach的复数形式为coaches。coach有两种词性，作名词时意为“(体育运动的)教练；私人教师；(多指)考前辅导教师；长途汽车；长途客车”，作动词时意为“(对体育运动、工作或技能进行)训练，培养，指导；辅导(尤指为让学员参加考试)；指示；特殊指导；专门传授”。

例句：

Hundreds of coaches will converge on the capital.

数百辆长途汽车将会在首都汇集。

The train was an elaborate affair of sixteen coaches.

这列火车由16节车厢组成，设计复杂精巧。

Commercial vehicles, coaches and lorries are required by law to be fitted with tachographs.

法律规定商用车辆、长途汽车和卡车要安装转速计。