表示時間的介詞和頻度副詞

1、.時間介詞at, in ,on 的用法1. at 1時間的一點、時刻等。如： They came home at seven oclock. at night, at noon, at midnight, at ten oclock, at daybreak, at dawn. 2后面接表示歲數(shù)的詞。 Children in China start school at 6 years old. 3較短暫的一段時間。可指某個節(jié)日或被認為是一年中標志大事的日子。如： He went home at Christmas at New Year, at the Spring Festival.2. i

2、n 1在某個較長的時間如世紀、朝代、年、月、季節(jié)以及泛指的上午、下午或黃昏等內。如： in 2019, in March, in spring, in the morning, in the evening, etc 2 在一段時間之后,常用于將來時。 He will arrive in two hours. These products will be produced in a month. 3. on 1詳細的時日和一個特定的時間，如某日、某節(jié)日、星期幾等。如： On Christmas DayOn May 4th, there will be a celebration. 2在某個特定

3、的早晨、下午或晚上。如： He arrived at 10 oclock on the night of the 5th. 3準時，按時。如： If the train should be on time, I should reach home before dark. 表示頻率的副詞用法詳解一、常見的頻率副詞always，usually，often，sometimes， seldom，never.1 always表示的頻率為100%，意思是"總是、一直、始終"。 I always do my cleaning on Sundays. 我總是在星期天搞衛(wèi)生。2usuall

4、y與always相比，表示的頻率要低些，約為70%-80%。意思是"通常"。 Plants are usually green. 植物通常是綠色的。 Usually she goes to work by bus. 她通常乘公共汽車去上班。 3often的頻率比usually又略低些，約為60%-70%，意思是"經(jīng)常"、"常常"。 Do you often write to them? 你常給他們寫信嗎？ Does Fred come here often? 弗雷德常來這兒嗎？ 4sometimes的頻率比often又低些，約為50%

5、sometimes30%，意思是“有 時、不時。 Jenny usually eats a sandwich for lunch. Sometimes she eats soup.5seldom 的頻率比sometimes還要低些約為20%左右，意思是“很少。 My father was seldom at home on Sundays. 我父親星期天很少在家。6never與always完全相反，是100%否認，意思是“從不，決不，總是不“。 I can never stop. 我絕不會停頓。 Li Ming never wears dresses. 李明從不穿裙子。 I would nev

6、er do anything to hurt him. 我絕不會做任何傷害他的事情。二、頻率副詞示意圖alwaysneverusuallyoftensometimesseldom0三、頻率副詞在句中的位置 通常頻率副詞放在行為動詞之前， be動詞，情態(tài)動詞或助動詞之后。但是sometimes最活潑。它既可以在句中也可以在句首，還能在句末。其它詞如often 也可以放在句中也可以放在句末，這里就不一一列舉了。四、注意的問題 always的完全否認形式是never,部分否認形式是not always.例如：She always wears a dress. 她總穿裙子。改否認句1She never

7、 wears a dress. 她從不穿裙子。徹底否認2She does not always wear a dress. 她不總穿裙子。部分否認有如：The rich are not always happy.富有未必是幸福的。時間介詞用法練習： 1. Children get gifts _ Christmas and _ their birthdays. A. on; on B. at; on C. in; in D. in; on 2.-There is nothing _tomorrow afternoon, is there? -No. We can have a game of

8、table tennis. A. on B. in C. out D. up 3. A lot of students in our school were born_March, 1981. A. in B. at C. on D. since 4. He suddenly returned_ a rainy night. A. on B. at C. in D. during 5. My grandfather was born_Oct. 10, 1935. A. on B. in C. at D. of 6. The train is starting_five minutes. A.

9、in B. at C. for D.still 7. Mike does his exercises _ seven _ the evening. A. on; to B. at; in C. by; of D. at; on 8. Children wake up very early_the morning of Christmas Day. A. in B. on C. 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 ve

10、ry cold_ the morning of our sports meeting. A. at B. on C. with D. of 11. Why did you get up so early _ this morning. A. on B. / C. at D. in 12. He went to Shanghai_ September 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

11、 12, 1984. . . A. on B. in C. at D. to 14. Mrs Brown came to China _ 2019. A.on B. of C. to, D. in 15 _ the morning of November 20, 1915, the workers came to Chicago to show their mourning of Joe 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.