介词at、on、in用法.pdf

选用介词at的场合：用于钟点前·atteno’clock·ataquartertosix用于时刻前·atnoon/night/midnight(半夜)·atsunrise(日出时)·atdusk(黄昏)·atdawn/daybreak(黎明)eg:Wewillleaveatdaybreak.我们将在黎明时动身。用于表示进餐时间。如：·atbreakfast/lunch/supper(在早餐时/午餐时/晚餐时)eg:Hedrinksteaatbreakfast.他在早餐时饮茶。用于表示年龄时。如：·at14(=attheageof14在14岁)eg:Helefthomeattheageof16.他十六岁离开了家。用于一些固定短语或习惯搭配中。如：·atChristmas·atNewYear·atThanksgiving(感恩节)·atthebeginning/endoflastmonth·atthemoment/atthattime·atthistimeofday·atabadtimeofyear·atfirst(起初)·atlast(终于)选用介词on的场合：用于星期、日期(包括该天的各部分)前·onSundays/weekdays·onMondaymorning/afternoon/eveningeg:I'mflyinghomeonSundayafternoon.我星期四下午乘飞机回家。“在周末”既可以说atweekends，也可以说onweekendseg:Ioftengofishingon/atweekends.我经常在周末去钓鱼。用于morning/afternoon/evening/night/day前，此时这类名词前多有修饰语或带有of等引起的后置修饰语，指具体的或不具体的某一日·onacoldafternoon·onthenightofOctober1,1997·onthefirstday·onhisbirthday·onFridayafternoon用于公共节假日前：·onTeachers’Day·onChristmasDay／Eve·onNationalDay特别注意：at，on都可用来表示“节假日”，但at侧重指“休假的时节”，而不是指具体的哪一天；on侧重指具体的时日，与它连用的短语中多含“Day”·atNewYear(在新年期间)·atChristmas(在圣诞节期间)·onNewYear’sDay(在元旦那天)·onChristmasDay(在圣诞节)选用介词in的场合：用于泛指一天的上午、下午、傍晚如：inthemorning/afternoon/evening/night用于某个较长的时间，像世纪、朝代、年、月、季节·inMarch·inspring·in1997·inthetwenty-firstcentury(在二十一世纪)·inone’sfifties(在某人50多岁时)用于表示“从现在起，多久以后或多长时间内”的短语之前She’llseemeagaininaweek’stime.一周后她再来看我。Icandrawabeautifulhorseinfiveminutes.我可以在五分钟内画好一匹好看的马。Therearesevendaysinaweek.一周有七天。省略介词的情况：有些情况，既不用in，也不用on和at，时间前面可不带介词。家长可以让孩子认清标志，注意哪些情况下要省略介词，避免画蛇添足。next，last，this，that与时间名词连用作状语时We’regoingtoworkonafarmnextSunday.下个星期天，我们要去农场劳动。TheyvisitedtheGreatWalllastyear.去年他们参观了长城。today,tomorrow,yesterday,thedaybeforeyesterday,等之前Areyoufreetomorrownight?明晚你有空吗?Wheredidyougothedaybeforeyesterday?前天你去哪儿了?