表示时间的介词和频度副词

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1、时间介词（at, in ,on）的用法1. at（1）时间的一点、时刻等。如：They came homeQseven oclock.（at night, at noon, at midnight, at ten oclock, at daybreak, at dawn）.（2）后面接表示岁数的词。Children in China start school |at 6 years old.（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：He went home ht Christmas!（at New Year, at the Spring Festival）.2.

2、in（1）在某个较长的时间（如世纪、朝代、年捉、季节以及泛指的上午、下午或傍晚等）内。如:in 2004, in March, in spring, in the morning, in the evening, etc（*5在一段时间之后，常用于将来时。He will arrive in two hours.These products will be produced in a month.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：On Christmas Day（ On May 4th）, there will be a celebration.（2）在某

3、个特定的早晨、下午或晚上。如：He arrived at 10 oclock on the night of the 5th.（3）准时，按时。如：If the train should be on time, I should reach home before dark.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）alway s表示的频率为100%，意思是”总是、一直、始终”。I always do my cleaning on Sundays.我总是在星期天搞卫生。2）usually与always相

4、比，表示的频率要低些，约为70%-80%。意思是”通常”。Plants are usually green.植物通常是绿色的。Usually she goes to work by bus.她通常乘公共汽车去上班。3) often的频率比usuallyX略低些，约为60%-70%，意思是”经常”、”常常”。Do you often write to them?你常给他们写信吗？Does Fred come here often?弗雷德常来这儿吗?4) sometimes的频率比oftenX低些，约为50%sometimes30%，意思是“有 时、不时”。Jenny usually eats a

5、 sandwich for lunch. Sometimes she eats soup.5) seldom的频率比sometimes还要低些约为20%左右，意思是“很少”。My father was seldom at home on Sundays.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“。I can never stop.我绝不会停止。Li Ming never wears dresses.李明从不穿裙子。I would never do anything to hurt him.我绝不会做任何伤害他的事情二、频率副词示意

6、图三、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: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：She always wears a dress.她总穿裙子。(改否定句)1) She never wears a dress.她从不穿裙子。(彻底否定)2) She does not always wear a dress.她不总穿裙子。(部分否定)有如：The rich are

7、not always happy富有未必是幸福的。时间介词用法练习：()1. Children get gifts Christmas and their birthdays.A. on; on B. at; on C. in; in D. in; on()2.-There is nothingtomorrow afternoon, is there?No. We can have a game of table tennis.A. on B. in C. out D. up()3. A lot of students in our school were born March, 1981.A

8、. in B. at C. onD. since()4. He suddenly returned a rainy night.A. onB. atC. in D. during()5. My grandfather was born Oct. 10, 1935.A. on B. inC. at D. of()6. The train is starting _five minutes.A. inB. at C. forD.still()7. Mike does his exercises seven the evening.A. on; toB. at; inC. by; ofD. at;

9、on()8. Children wake up very early the morning of Christmas Day.A. in B. onC. for D. at()9 a cold winter morning, I met her in the stfeet.A. In B. On C. At D. For()10 It happened to be very cold the morning of our sports meeting.A. at B. on C. with D. of()11. Why did you get up so earlythis morning.

10、A. onB. / C. at D. in()12.He went to ShanghaiSeptember 3, 1991 and came back a cold morning last year.A. in; on B. on; in C. on; on D. in; ia()13. Lucy was born the night of May 12, 1984A. on B. in C. atD. to()14. Mrs Brown came to China 1996.A.on B. of C. to,D. in()15 the morning of November 20, 19

11、15, the workers came to Chicago to show their mourning ofJoe Hill.A. On B. In C. On D. At()16. Ann moved Hangzhou September, 1992.A. /; in B. to; in C. to; on D, in; in()17. They started off an autumn afternoon.A. during B. at C. in D. on()18. He often goes school six thirty the morning.A. for; to; in B. to; at; in C. to; for; at D, for; at; to()19. He arrived Shanghai 9: 30 March 5.A. at; in; at B. to; on; at C. in; on; at D. in; at; on()20.The English teacher told me to get therehalf past ten.A: in B. at C. on D. of精品文档word文档可以编辑！谢谢下载！