1、1七年级上册基础知识点1、缩写1、肯定what is缩写为 whats I am缩写为 Im he is缩写为 hes she is缩写为 shes you are缩写为 youre they are缩写为theyre we are缩写为 were I would缩写为 Id You had better缩写为 Youd better Let us缩写为 Lets2、否定is not 缩写为 isnt are not 缩写为 arent can not缩写为 cant 3、助动词主语为单数，含行为动词的肯定句变否定句或疑问句助动词须用 do;主语非单数，含行为动词的肯定句变否定句或疑问句助动词
2、须用 does.do not缩写为 dont does not 缩写为 doesnt2、名词复数的特殊形式(名词单数-名词复数)不可数名词：肉类、液体类、空气、空间、纸、头发、消息、金钱。box-boxes class-classes watch-watchescountry-countries city-cities hero-heroes potato-potatoes tomato-tomatoesknife-knives wife-wives scarf-scarves或 scarfsman-men woman-women child-children tooth-teeth foot
3、-feet sheep-sheep deer-deer Chinese-Chinese Japanese-Japanese this-these that-those am,is-areI-we he,she,it-they you-you3、一般现在时态的时间状语：often、usually、sometimes、 every day.2结构：主语(主格)+谓语动词+宾语（宾格）简记：主语是单数( 单个人、单个物及人称代词 he、 she、 it)，动词用三单；主语非单数( 第一人称 I,第二人称 you及名词复数 )，动词用原形。Be动词：第一人称 I后面 be动词用 am,第二人称 you
4、或复数后面 be动词用 are,单个的人、物及单数人称代词后面 be动词用 is.动词第三人称单数特殊形式：have-has carry-carries go-goes do-does teach-teaches guess-guesses4、现在进行时态的时间状语：now、at the moment(此刻)；Listen! Look!结构：主语+be(am,is,are)+V-ing+宾语。动词 ing形式的特殊形式：write-writing dance-dancingswim-swimming shop-shopping run-running sit-sitting5、词性变化1、名词
5、 n变为名词 nCanada-Canadian China-Chinese2、名词 n变为形容词 adjcolour-colourful fun-funny luck-lucky noise-noisy friend-friendly cloud-cloudysun-sunny rain-rainy snow-snowy wind-windy 6、不定冠词 a或 an an apple an eraser an office an orange an egg an elephant7、重点短语或句型。形容词 adj修饰名词 n;副词 adv修饰副词 adv、形容词 adj和动词 v;名词或代词
6、作主语（或宾语） ，动词作谓语。动词不定式：want to do sth be ready to do sthIts time for sb to do sth would like to do sth后接 ing形式：have fun doing sth how/what about doing sth3后接动词原形的形式：lets+do sth may/can+do sthYoud better+do sth have to+do sth八、基数词变为序数词基数词 one two three four five six序数词 first second third fourth fifth
7、sixth基数词 seven eight nine ten eleven twelve序数词 seventh eighth ninth tenth eleventhtwelfth通常序数词前需要加定冠词 the.Eg:Sunday is the first day of a week.九、疑问句1、一般疑问句用 yes或 no回答，其中借助助动词 do、does 或情态动词can、may 的，回答也要用它们回答。2、特殊疑问句对颜色提问用 what colour 对地点提问用 where对是谁提问用 who 对谁的提问用 whose对是什么提问用 what 对年龄提问用 how old对价格提问用 how much或 whats the price of 对多少提问，可数名词复数用 how many,不可数名词用 how much对身高提问用 how tall 对交通方式提问用 how：Whats the matter?=Whats wrong with you? 你怎么啦？十、反义词old-new old-young tall-short happy-sad big-small white-black up-down on-off
