close和closely做形容词和副词的区别,急!

一般有LY的表示抽象， 没LY 的表示具体close做副词用时意为“靠近地”，表示具体意义 close作形容词表示关系近closely意为“紧密地，密切地”，表示抽象感念1.They're __close______friends in the class,They always sit ____close______.(close)2.When the teacher came into the classroom,he watched every student __closely_______.(close)