by,beside 和near表示“在...旁边”时有什么区别?

1) by和beside均表示“在……旁边”,常可换用 例：There is a chair by the table.桌子边上有一把椅子.She stood by the window.她站在窗边.The hotel is beside (/by) the river.那家饭店在河边.Come and sit beside (/by) me.过来,坐在我边上.Put your shoes beside mine.把你的鞋子放在我的鞋子旁边.2) near表示“在……附近”,表示的距离比by和beside稍远些,也时常换用 例：There is a theatre near his home.他家附近有一家剧院.Don't play near the road.不要在马路附近玩.There is a post office near No.1 Middle School.第一中学附近有一所邮局.3) next to表示“紧靠……的旁边” 例：The new building next to the bookstore is a cinema.书店旁边的那幢新楼是一家电影院.There is a café next to the barber's.理发店隔壁是一家咖啡馆