shoe意为鞋子，a shoe是一只鞋子，a pair of shoes是一双鞋子。根据不同的含义有不同的用法。
例句：My mummy got/ bought me a pair of new shoes.
我妈妈给我买了一双新鞋。
One day he wanted to buy himself a new pair of shoes.
有一天他想给自己买双新鞋。
They opened his box and found a pair of sports shoes inside.
他们打开他的箱子,发现里面有一双运动鞋。
These shoes should last you till next year.
你这双鞋应该能穿到明年。
His shoes were beginning to show signs of wear.
他那双鞋看样子快穿坏了。
These tennis shoes are designed for comfort and performance.
这些网球鞋的设计穿起来舒服，易于发挥成绩。
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