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1、小学介词专项练习一、 时间：1)in , on，at 在时in表示较长时间，如世纪、朝代、时代、年、季节、月及一般（非特指）的早、中、晚等。如 in the 20th century, in the 1950s, in 1989, in summer, in January, in the morning, in ones life , in ones thirties等。on表示具体某一天及其早、中、晚。如on May 1st, on Monday, on New Years Day, on a cold night in January, on a fine morning, on Sun
2、day afternoon等。注意：在last, next, this, that, some, every 等词之前一律不用介词。如：We meet every day.at表示表示某一时刻或较短暂的时间，或泛指圣诞节，复活节等在：at seven oclock, at a quarter past four, at eleven twenty, at noon, at night, at midnight, at this time of year, at the beginning of, at the end of , at the age of , at Christmas, at
3、this moment等。1) My father usually goes to work _ (at, in, on) 8:00.2) The party will begin _ (at, in, on) 2:00pm.表示在早晨，下午，晚上：in the morning, in the afternoon, in the evening.1) We never go shopping _ (at, in, on) the evening.2) I get up at 7:30 _ (at, in, on) the morning.表示在具体某一天：on Monday, on Satur
4、day, on Childrens Day, on June 22, 2006, on Teachers day1) Christmas is _ (at, in, on) December 25th.2) What is the first lesson（课）_ (at, in, on) Tuesday? 3) Mr. Web will go to Shanghai _ (at, in, on) Oct. 22nd.4) He often plays football with his friends _ (at, in, on) Sunday.5)Children dont go to s
5、chool _(at, in, on) New Years Day.“在星期天的早晨”这一类应用on Sunday morning（具体一天早上）( ) 1. The girl usually practices the piano _ Saturday morning. A. on B. in C. at( ) 2. He left home _ a cold winter evening. A. at B. on C. in表示大约时间(about)：Its about six oclock now. 现在大约6点钟了。表示一段时间(for)：for two years, (how lon
6、g)（任何时态）表示一段时间之后(in)：in two days, (how soon)（将来时）after + 时间段，常用于过去时：这里的时间段一般不是具体时间，一般不说after three days，而是three days after，但可以说 after a period of time，如：After a while, he came here.after + 时间点，可用于各种时态：After dinner I watch TV. 晚饭后我看电视。After five, he came here.一段时间+later/ago，分别表示“(多久)以后/以前”，主要用于过去时态。a
7、fter/before+某个时刻，分别表示“在某时刻之后/之前”，此时两个词是介词。ago与before：ago只能用于过去时, before用于完成时。如：He had an accident a week ago.(一周前出了一个事故).Some years later, the boy became a very famous singer.(数年后这个男孩成了著名的歌唱家).Have you been there before?(你从前到过那儿吗？).After a few years he gave up smoking. (过了几年他戒了烟。)since+时间点，常用于完成时态：s
8、ince three days ago，I have lived here since I was ten years old.until+时间点（特定的时间，某事发生）：直到为止，在之前not until+时间点（特定的时间，某事发生）：直到才He didnt turn up until half an hour later.（半小时后他才出现）as soon as 一.就when与while(1) when既指时间点，也可指一段时间，while只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。(2) when
9、 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。(3) 由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如：When the teacher came in, we were talking. 当此句改变主从句的位置时，则为： While we were talking, the teacher came in. They were singing while we were dancing. (4) when和
10、while 还可作并列连词。when表示“在那时”；while表示“而，却”，表对照关系。如： The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。He is strong while his brother is weak. 他长得很结实，而他弟弟却很瘦弱。时间相关的固定搭配：at first 起初；at last 最后at present 现在at the same time 同时on time 准时地
11、in time 及时地at once 立刻；马上in a minute 立刻in a hurry 匆忙地 in the end 相当于 at last, finally, 是副词,意思是“最后,最终,终于”如：In the end, she found the solution to the problem. (最后,她找到了解决这个问题的方法.)at the end通常后边要跟上其它成分, 即完整的形式是: at the end of sth, 意思是“在.的末尾，在.结束的时候”, 如：At the end of the month, she finished the task. (在月末
12、的时候,她完成了任务.)at school 在上课，在上学（=in school 在求学、在上学）in hospital 住院at work 上班，在工作in class 在课堂上on duty 值日on holiday 度假at school表示“在学校、在上学”相对于在家里或在校外，强调所在场所或时间，如：My son is at school now. He is not at home or somewhere else. 我儿子现在在学校，他不在家，也不在别的地方。in school “在求学、在上学”相对于有工作，强调主语的身份是学生。如：My daughter still in
13、school, She doesnt work.。 我女儿还在上学，她不在工作。in a / the school “在学校”，不一定指上学。类似的还有：in hospital “生病住院”in a / the hospital表“在医院”（工作或探视病人等）on/during ones birthday不加介词的时间短语：1. next, last, the next, the last 加时间名词做状语时，其前可不用介词。例如： He is going to meet my parents next week. 下周他要见我的父母。 Who was on duty last week? 上
14、周谁值日？ 2. this, that, these, those 构成的时间状语前可不用介词。例如：（time、day例外） We are going to have a new English book this year. 今年我们将有一本新英语书。 He didnt go back that night. 那晚他没有回来。 3. today, tomorrow, yesterday, the day before yesterday, the night before last, the day after tomorrow 前不用介词。例如： Who is on duty today? 今天谁值日？ He got up early yesterday. 昨天他起得早。 4. 由 one, any, each, every, some 等构成的时间状语前，可不用介词。例如： Tom gets up at six every morning. 汤姆每天早晨 6 点钟起床。 You can come to ask me any time you like. 在你方便的时候可以来找我。 5. 以 all 开头的时间状语（如 all the week, all day 等）之前，可以不用介词 for。例如： She was busy all day yesterday.
