close 是指距离、场所、地点等的“接近，靠近”，可以说是一种实际意义上的“接近”。close to有“接近，几乎，大概，差不多”的意思。例如：We live close to the church。closely 是指抽象意义上的“接近”，多用比喻意义，有“亲密地，严密地，仔细地”等意思。例如：The secret must be closely guarded.这个秘密要严加保守。
Close与Closely的用法区别
1. close adj. 靠近；接近;亲密；密切 短语：get/be close to 靠近；亲近
The church is close to the shops. Are you a close friend of theirs?
2.close adv. 靠近；接近 （表具体意义） 短语：hike/walk/run/sit/stand close to...
He was standing close to the door.
3. close v. 关上；关闭(不开发)；结束 She closed her eyes. / Her eyes closed. (闭上)
4. closely adv. 紧密地；仔细地；密切地（表抽象意义） He got closely in touch with the magazines of today. The little baby was closely looked after by her.
5.close 与 closely 作副词时，close含具体之意，closely 含抽象之意。 类似的词组有 high (高) -- highly (高度地)，deep (深深地) -- deeply (深入地)，
wide (很开，宽) -- widely (广泛地)，low (低的)-- lowly (低贱的) (作形容词)
The kite flies high.（具体）
They spoke highly of the brave young man.（抽象）
He often dives deep into the sea.（具体） I'm deeply moved by the moving film.（抽象）
close adj. 近的, 紧密的, 精密的, 齐根的, 封闭的, 亲密的, 闷气的 adv接近, 紧密地
close修饰具体的事物,stand close;sit close
closely adv. 接近地 仔细地 修饰抽象事物
