英語重點語法詳解解析dropinon和dropinat的區別.dropinon解析：dropinon后面接表示人的名詞或代詞。IthoughtI'ddropinonyouwhileIwaspassing.我曾想路過時順便來看看你。It'simpropertodropinonhimsocasually.這樣冒冒失失去找他可不好。Idroppedinonhimonmywayhome.我在回來的路上趁便去他家看了看。Oneday,thepoormandroppedinonawiseoldmanandaskedhimforadviceaboutchanginghislife.一天，這個可憐的人拜訪了一位聰明的老人，向他請教如何改變他的生活。Theydroppedinonusastheywerepassingthroughtown.他們經過鎮子的時候111頁便拜訪過我們。Onmywaytothepark,Idroppedinonafriendofmine.在我去公園的路上，我順道看望了我的一個朋友。HedroppedinonsomeoldcomradesonhisvacationtriptoBeijing.他在去北京度假時順便訪問一些老同志。.dropinat解析：dropinat后面接表示處所的名詞或代詞。OnmywayhomeIdroppedinathishouse.在我回家的路上，我順便到他家一趟。Hedroppedinatourschoolyesterday.他昨天順便拜訪了我們學校。Let'sdropinatTom's.讓我們到湯姆家坐坐。Idroppedinattheclubonmywayhome.在回家的路上我順便去了俱樂部。Pleasedropinatmyofficewhenyouhappentobefree.如果你碰巧有空的話，請到我的辦公室來。TheSecretaryaskedmetodropinathisoffice.書記讓我到他辦公室去找他。Shallwedropinatacoffeeshop?我們順便去一下咖啡店好嗎？Won'tyoudropinatourhouseandhavetea?你不想順便來一下我們家喝杯茶嗎？Iwillcallonhimtomorrow.我明天將去拜訪他.I'llcallonyouinmysparetime.有空我去找你。Hejustcallsinoccasionally...他只是偶爾過來坐坐。Builderswerecalledintomakethebuildingsafe.召來建筑工加固這棟大樓。Wehadtocallinaplumbertounblockthedrain.我們只得叫個管子工來疏通下水道。Publichealthofficialswerecalledintoinspectthepremises.公共衛生官員奉召來視察了建筑物。Themilitarywas/werecalledintodealwiththeriot.已調來軍隊平息暴亂。Troopswerecalledintosubduetherebels.軍隊被調來鎮壓反叛者。Forensicexpertswerecalledin法醫專家被請來。Callinanarchitectorsurveyortooverseethework.找個建筑師或監理員來監工。TheFBIhasbeencalledintoinvestigate.聯邦調查局奉命進行調查。Emmahasjustcalledinsick.埃瑪剛才打電話來請病假了。Icalledinatmylocalonthewa