Question

1.当要表示两双（对、副）或多双（对、副）东西时,pair 要变为 _______形式,即pairs

Answer 1

2.(a) pair (s) of 做主语时,谓语动词的单复数变化要以pair为准.例如：

This pair of runners _is______mine.这双跑鞋是我的.

The six pairs of trousers __are_______ Jenny's.这六条裤子是詹妮的.、

改错：

There are six pair of trainers in the box.__改为pairs______.

The pair of sock is new._____改为socks______.