基数词和序数词。
基数词序数词0zero
1onefirst/1st第一2twosecond/2nd第二3threethird/3rd第三4fourfourth/4th第四5fivefifth/5th第五6sixsixth/6th第六7sevenseventh/7th第七8eighteighth/8th第八9nineninth/9th第九10tententh/10th第十11eleveneleventh/11th第十一12twelvetwelfth/12th第十二13thirteenthirteenth/13th第十三14fourteenfourteenth/14th第十四15fifteenfifteenth/15th第十五16sixteensixteenth/16th第十六17seventeenseventeenth/17th第十七18eighteeneighteenth/18th第十八19nineteennineteenth/19th第十九20twentytwentieth/20th第二十。
21twenty-onetwenty-first/21st第二十一22twenty-twotwenty-second/22nd第二十二23twenty-threetwenty-third/23rd第二十三30thirtythirtieth/30th第三十40fortyfortieth/40th第四十50fiftyfiftieth/50th第五十60sixtysixtieth/60th第六十70seventyseventieth/70th第七十80eightyeightieth/80th第八十90ninetyninetieth/90th第九十100hundredhundredth/100th第一百基数词变序数词变化规则基变序，有规律，词尾—th加上去；1，2，3，特殊记；
词尾字母t,d,d(first, second, third )8少t,9减e；（eight --eighthnine—ninth）ve要用f替；（five --fifthtwelve---twelfth）见y变成i和e，再加th莫忘记；（twenty --twentieth）
若要遇到几十几，只变个位就可以。（forty–fourforty–fouth）
介词：1、介词的主要用法：
介词是一种虚词，不能独立使用。介词之后一般有名词或代词(宾格)或相当于名词的其他词类、短语或从句作它的宾语，即构成介词短语。有些介词是由两个以上的词构成的短语介词，如：
out of(从…**来), away from(距离…),next to(在…隔壁), in front of(在…前方)等。2、介词的分类表：(见下表)
地点(位置、范围)介词：after在…后面， at在…处， before在。前， behind在。
后， beside在。旁边， between在。之间， from来自。
in在。里面， near靠近。on在。
上面， outside在。外面，under在。下方， in front of在。
前，in the middle of在。的中间， at the back of在。的后部，等等。
方向(目标趋向)介词：along沿着。around绕着。
at朝着。down向…下， for向。from从/离。
in进入。into进入。near接近。
off脱离/除。out of向。外， outside向。
外， to向/朝。up向。上， away from远离。
时间介词：about大约。after在…以后， at在… (时刻), before在…以前， for有…(之久), from从…(时)起， in在(上/下午); on在(某日), past过了…(时), to到(下一时刻),方式介词：
as作为/当作。by用/由/乘坐/被。in用…(语言),like与…一样， on骑(车)/徒(步),with用(材料),用(手/脚/耳/眼),涉及介词：
about关于。in在…(方面), of…的，有关。to对…而言， with就…而言其它介词：
目的介词】for为了。to为了…
比较介词】as与…一样，like象…一样，than比。to与…相比少，伴随/状态介词】at在(上班/休息/上学/家，etc.),in穿着…(衣服/颜色),on在(值日),with与…一起，有/带着/长着。
3、介词短语的句法作用：
介词短语相当于一个形容词或副词，可用作状语、定语和表语。如：themancame.
(状)(那个人走下楼来)/the woman is from thecountryside.(定)(头上戴花的妇女来自乡下)/the teacher is now with the students.(表)(老师现在和学生在一起)
4、介词短语在句子中的位置：
介词短语做状语时，如果表示时间/地点，可以放在句首或句尾，如果表示方向/方式/伴随/涉及/原因/目的/比较，一般放在句尾；介词短语作表语时放在连系动词之后；介词短语作定语时，只能放在被修饰的名词之后。如：he wanted to find a good job in shanghaithenext year.
(状语)(他想来年在上海找份好工作)/ they searched the room for the thief.(他们在房间里搜索小偷)/thelettersareforyou.(表语)(信是给你的)/h**eyouseenacatwithablack head and four white legs?
(定语)(你看见一只黑头白腿的猫了吗？)
5、重要注释：
this / that / these / those / last / next / a / every / each等词构成的时间短语，前面不用任何介词。如：every year tr**ellers from abroad come to visit pingyao.
(每年都有国外的游客。
来游览平窑镇)/ he had a bad cold that week.(那个星期他患重感冒)
记住一些固定词组：on foot(步行), at night(在晚上), play with(玩耍……)look outof(朝…外面看),withone’shelp(在…的帮助下),lookafter(照料…),lookfor(寻找…),onabike(=by bike)骑车， help sb. with(帮某人做…)等等。
6、某些介词的用法辨析：
时间或地点介词in、on、at的用法区别：表示时间时，in表示在一段时间里(在将来时句子中则表示在一段时间之后), on表示在具体的某一天或者某天的上下午等， at表示在某个时刻或者瞬间；表示地点时， in表示在某个范围之内， on表示在某个平面上或与一个面相接触，at则表示在某个具体的场所或地点。如：
he was born on the morning of may10th.(他出生于五月十日的早晨)/ i usually get up at 7：00 in the morning.
(我通常在早上的七点钟起床)/hisglassesarerightonhisnose.(他的眼镜就架在他的鼻子上)/heisatthecinema at the moment.(此刻他正在电影院)
after与in表示时间的用法区别：―after+(具体时刻/从句)‖表示―在…时刻之后‖常用于一般时态；―in+(一段时间)‖表示―在(多久)之后‖,常用于将来时态。如：
hesaidthathewouldbehereafter6：00.(他说他六点钟之后会来这儿)/myfatheriscomingbackfromengland in about a month.
(我父亲大约一个月以后从英国回来)
by、in与with表示方式的用法区别：都可以表示―工具、手段‖,但是by主要表示―乘坐‖某个交通工具或―以……方式‖,in表示―使用‖某种语言/文字，with表示―使用‖某个具体的工具、手段。如：
we see with our eyes and walk with our feet.(我们用眼睛看东西，用双脚走路)/ please write that article(文章) in english.(请你用英语写那篇文章)/ let’s go to the zooby taxi.
(我们打的去动物园吧。)/it was written by lao she.(那是老舍写的)
in front of与in the front of：in front of―在…的前面‖,与in the front of―在…的前部‖。如：
a car was parking in front of the hall.(大厅跟前停着一辆汽车)/ in the front of the hallstood a big desk.(大厅前部立着一个大讲台)
用适当的介词填空：
1. tom is the boy __glasses.
2. please read some bookschinese medicine.3.
she works in the day and has a rest __night.4. my uncle works __a farm.
5. mr black and yang ling are talkinga party.6.
she wants __buy a sweater __her daughter.7. it’s a map __china.
8. let’s h**e a look __the picture.9. what’s that __chinese?10. i’m __classone.
11. there is a clock __the wall __the classroom.
12. can you see an apple __the tree? no, but i can see a bird __the tree.
13. there is a purse __here.14.
there is a boat __the lake.15. there are many kites __the sky.
16. what clothes is she wearing? she is __red.17. can you see the boy __the bike?
18. the woman __a yellow dress is my mother.
19. who can you see __the picture?
20. who’s the manyour mother and father?21.
gao shan gets up __6:00 __the morning.22.
we don’t h**e classes __sunday morning.23. what do you often do __saturday?
24. can you help me __my maths?25.
what’s wrong __you?26. who’s __duty?
27. it’s time __supper.
28. shecan’t find the way. so she asks the policeman __help.
29. a man __shanghai goes to the park __his daughter.
30. your socks are __the desk. put them away.
you must look __your things.31. my sister is drawing a picturecrayons.
32. i’m thirsty. what __you?
33. what would you like __breakfast?34.
he is american. he is __the usa.35.
he is __home. he isn’t __school.36.
the lunch __our school is good.37. he is playing __a you-you.
38. i am good __running. tom does well __jumping.39. the girls play cards __class.
40. take __the old coat. put __the new one.
41. i’m looking __my dog. i can’t find it.
42. they are talking __mr. green.
they are talk __the film.43. the cat is running __the mouse.
44. peter looks __his father.
45. he is learning frenchthe tape.46.
frenchmen comefrance.47. please write __me soon.
48. jack goes to school __foot. jim goes to school __bike.
49. the farm is not farhis home.50.
don’t be late __school.
51. she’s ill. she stays __bed all day.
52. there are a lot of peoplered apple hotel.
53. the supermarket is open __9:00 they are getting __the bus.
55. we are playing footballthe playground.56weekends, when do you get up?
57. the bookshop is not __shanghai street, it isbeijing road.58. don’t laugh __anyone.
59. he looksthere is no one nearby.60. the thief is runningthe shop.
61. the hospital is 5 kilometersthe shopping center.62. class one isclass two.
63. there is a rivermy house.64. they are walking __the lake.
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