初中英語語法表示時(shí)間的介詞on,in,at（課堂PPT）

1、1PREPOSITIONS OF TIME:AT, IN, ON2We use:at for a PRECISE TIMEI have a meeting at 9am.The shop closes at midnight.Jane went home at lunchtime.at 3 oclockat 10.30amat sunriseat bedtimeat dinnertimeat noonat the momentat sunset3We use:in for MONTHS, YEARS, CENTURIES and LONG PERIODS.In England, it ofte

2、n snows in December.Do you think we will go to Jupiter in the future?There should be a lot of progress in the next century.in the Summerin Mayin the Ice Agein the past/futurein the 1990sin the next centuryin 1990in Summer4We use:on for DAYS and DATESDo you work on Mondays?Her birthday is on 20 Novem

3、ber.Where will you be on New Years Day?on Sundayon Sundayon Tuesdayson Tuesdayson 6 Marchon 6 Marchon 25 Dec. 2010on 25 Dec. 20105Notice the use of the preposition of time at in the following standard expressions:ExpressionExampleat nightThe stars shine at night.at the weekend*I dont usually work at

4、 the weekend.at Christmas*/EasterI stay with my family at Christmas.at the same timeWe finished the test at the same time.at presentHes not home at present. Try later.6Prepositions of time7Notice the use of the prepositions of time in and on in these common expressions:inonin the morningon Tuesday m

5、orningin the morningson Saturday morningsin the afternoon(s)on Sunday afternoonsin the evening(s)on Monday evening8When we say last, next, every, this we do not also use at, in, on.I went to London last June. (not in last June)Hes coming back next Tuesday. (not on next Tuesday)I go home every Easter. (not at every Easter)Well call you this evening. (not in this evening)9Remember:in for la