There is a couple of Children这句话对么?为什么?There is a pair of sh

语法正确的句子是There ARE a couple of childrenThere ARE a couple of books但是There IS a pair of shoesThere IS a pair of glovesThere IS a pair of socksThere IS a pair of pantsThere IS a pair of chopsticks究竟什么时候用单数动词 IS,什么时候用复数 ARE 基本原则是1。如果两个物体一般被视为一个单元或当作一个单元来用（比如 “一双鞋子”,“一条裤子”,“一双筷子”,等等）,用单数 is ,但如果被视为分开的物体,用复数 are ,2。如果语境表示这些物体是一个单元,用单数 is ,否则用复数,例：There IS a group of people coming tonightThere ARE a group of people arguing over what to have for lunch上面是根据语法回答,但说实话,国外很多说英语的人对这点时常不那么注意这个原则。我是加拿大人,前英语老师。