表示时间的介词和频度副词

表示时间的介词和频度副词表示时间的介词和频度副词表示时间的介词和频度副词xxx公司表示时间的介词和频度副词文件编号：文件日期：修订次数：第1.0次更改批准审核制定方案设计，管理制度时间介词(at,in,on)的用法at（1）时间的一点、时刻等。如：Theycamehomeatseveno’clock.(atnight,atnoon,atmidnight,atteno’clock,atdaybreak,atdawn）.（2）后面接表示岁数的词。ChildreninChinastartschoolat6yearsold.（3）较短暂的一段时间。可指某个节日或被认为是一年中标志大事的日子。如：HewenthomeatChristmas（atNewYear,attheSpringFestival）.2.in（1）在某个较长的时间（如世纪、朝代、年、月、季节以及泛指的上午、下午或傍晚等）内。如：in2004,inMarch,inspring,inthemorning,intheevening,etc（2）在一段时间之后,常用于将来时。Hewillarriveintwohours.Theseproductswillbeproducedinamonth.3.on（1）具体的时日和一个特定的时间，如某日、某节日、星期几等。如：OnChristmasDay（OnMay4th）,therewillbeacelebration.（2）在某个特定的早晨、下午或晚上。如：Hearrivedat10o’clockonthenightofthe5th.（3）准时，按时。如：Ifthetrainshouldbeontime,Ishouldreachhomebeforedark.表示频率的副词用法详解一、常见的频率副词always，usually，often，sometimes，seldom，never.1)always表示的频率为100%，意思是"总是、一直、始终"。IalwaysdomycleaningonSundays.我总是在星期天搞卫生。2）usually与always相比，表示的频率要低些，约为70%-80%。意思是"通常"。Plantsareusuallygreen.植物通常是绿色的。Usuallyshegoestoworkbybus.她通常乘公共汽车去上班。

3）often的频率比usually又略低些，约为60%-70%，意思是"经常"、"常常"。Doyouoftenwritetothem你常给他们写信吗

DoesFredcomehereoften弗雷德常来这儿吗

4）sometimes的频率比often又低些，约为50%＞sometimes＞30%，意思是“有时、不时”。Jennyusuallyeatsasandwichforlunch.Sometimessheeatssoup.5）seldom的频率比sometimes还要低些约为20%左右，意思是“很少”。MyfatherwasseldomathomeonSundays.我父亲星期天很少在家。6）never与always完全相反，是100%否定，意思是“从不，决不，总是不“。Icanneverstop.我绝不会停止。LiMingneverwearsdresses.李明从不穿裙子。Iwouldneverdoanythingtohurthim.我绝不会做任何伤害他的事情。二、频率副词示意图alwaysalwaysneverusuallyoftensometimesseldom0三、频率副词在句中的位置通常频率副词放在行为动词之前，be动词，情态动词或助动词之后。但是sometimes最活跃。它既可以在句中也可以在句首，还能在句末。其它词如often也可以放在句中也可以放在句末，这里就不一一列举了。四、注意的问题always的完全否定形式是never,部分否定形式是notalways.例如：Shealwayswearsadress.她总穿裙子。(改否定句)1）Sheneverwearsadress.她从不穿裙子。(彻底否定)2）Shedoesnotalwayswearadress.她不总穿裙子。（部分否定）有如：Thericharenotalwayshappy.富有未必是幸福的。时间介词用法练习：()1.Childrengetgifts____Christmasand____theirbirthdays.A.on;onB.at;onC.in;inD.in;on()isnothing____tomorrowafternoon,isthere-----No.Wecanhaveagameoftabletennis.A.onB.inC.outD.up()3.Alotofstudentsinourschoolwereborn____March,1981.A.inB.atC.onD.since()4.Hesuddenlyreturned____arainynight.A.onB.atC.inD.during()5.Mygrandfatherwasborn____Oct.10,1935.A.onB.inC.atD.of()6.Thetrainisstarting___fiveminutes.A.inB.atC.for()7.Mikedoeshisexercises____seven_____theevening.A.on;toB.at;inC.by;ofD.at;on()8.Childrenwakeupveryearly____themorningofChristmasDay.A.inB.onC.forD.at()9____acoldwintermorning,Imetherinthestfeet.A.InB.OnC.AtD.For()10Ithappenedtobeverycold____themorningofoursportsmeeting.A.atB.onC.withD.of()11.Whydidyougetupsoearly___thismorning.A.onB./C.atD.in()12.HewenttoShanghai___September3,1991andcameback___acoldmorninglastyear.A.in;onB.on;inC.on;onD.in;ia()13.Lucywasborn____thenightofMay12,1984.....A.onB.inC.atD.to()14.MrsBrowncametoChina____1996.B.ofC.to,D.in()15___themorningofNovember20,1915,theworkerscametoChicagotoshowtheirmourningofJoeHill.A.OnB.InC.OnD.At()16.Annmoved___Hangzhou___September,1992.A./;inB.to;inC.to;onD,in;in()17.Theystartedoff___anautumnafternoon.A.duringB.atC.inD.on()18.Heoftengoes____school____sixthirty____themorning.A.for;to;inB.to;at;inC.to;for;atD,for;at;to()19.Hearrived__