a pair of shorts= some shorts?

问题描述:

a pair of shorts= some shorts?
It was a very hot day so I put on some shorts and a T-shirt to go sightseeing.
a pair of shorts= some shorts吗?

不等.作宾语时a pair of shorts一条短裤 some shorts短裤,差不多.
作主语时,a pair of shorts 后面的谓语用单数,some shorts谓语用复数.