介词
介词是一种虚词，它在句中的作用却非常重要。它用来表明名词与句中其他词的关系，
不能单独使用。常考点包括一些固定搭配和一些近义词。固定搭配如：on one's way home,help...with,send for,be interested in..., be late for, be angry with,be good at等。 常用介词解析及用法比较： at,on和in：这三个介词在试卷中的出现频率极高。对于它们的的分辨只要记住一句话就可以了。at表示点，on表示线，in表示面。什么意思呢？也就是说它们表达的范围逐渐增大。at six o'clock, at noon, at the age of sixteen等用at表示时刻或时间的点以及年龄。on具体到一周中的各天,日期及某特定的一天早上,下午,晚上：on Saturday，on July 1st，on my birthday，on the morning of July 16th，on a spring afternoon。in表达的范围更大一些。与世纪、年代、季节、月份以及早上、上午、晚上等连用。如：in the seventh century，in 1950's ,in 2000, in the morning等。 for,since：for表示多长时间。since后接时间起点,其终点往往为现在，常与完成时连用。牢牢记住哟。 after, in ：这两个介词都可以表示时间"在以后"的意思。其区别是：after 以过去为起点，表示过去一段时间之后，常用于过去时态的句子；in 以现在为起点，表示将来一段时间以后，常用于将来时态的句子。 by，with，in：by表示"以...的方式，方法，手段" 和 "乘某种交通工具"；with指"借助于具体的手段或工具"；in 表示"以......方式，用语言，文字等媒介"。 for和of：试比较：It's impossible for me to watch TV after eleven o'clock. It's kind of you to help me. 两句中介词的选择依据其前形容词而定,一般来说,of之前的形容词往往是用于描写人的品质的好坏，人自身的特点，如聪明与否，细心与粗心等；for之前的形容词用于描写事物的特点，如可能性，必然性，难易程度等。 练习： 1. Can you tell the story ______Russian? A. with B. in C. on D. by 2. Here are some birthday cards ______ our teachers, ______ our best wishes. A. of, with B. for, with C. of, in D. for, in 3. The visitors _______Japan arrived _____ Beijing station last Tuesday morning . A. from, at B. of , to C. from , to D. of, on 4. He's badly hurt, we must send _____ a doctor at once. A. to B. up C. on D. for 5. Do you usually come to school ______ foot or _____- bike? A. by ... by B. on... on C. on ... by D. by ... on 6. --when was Jim born? --______July, 18,1978. A.on B.at C. in D.to 7. WeiFang bought a new pen at a shop _____ her way home. A. on B. at C. in D. to 8. Don't tell anybody about it. Keep it a secret _______ you and me. A. among B. between C. in D. with 9. The teacher will be back ______ an hour. A. in B. after C. of D. at 10. -- How long have you been in Beijing ? --I've been here _____ 1989. A. in B.since C.on D.for
