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1、七年级上册英语前三单元语法点汇总七年级上册英语前三单元语法点汇总 Unit 1 be动词 重点语法 动词be(am,is,are)的用法:be动词包括“am”, “is”, “are”三种形式。 一人称单数(I)协作am来用。句型解析析:I am+ 例句:I am Snoopy. I am ten years old. I am a student. I am a boy. 其次人称(You)协作are运用。句型解析:You are+ 例句:You are my good friend. You are a good teacher. You are beautiful 第三人称单数(He o
2、r She or It)协作is运用。句型解析:She(He, It) is + 例句:She is a good girl. She is so tall. She is short. 人称复数 (we /you/they)协作are运用。句型解析:We (You, They) are + 例句 We are in Class 5,Grade 7. They are my friends. You are good students. 用法口诀: 我(I)用am, 你(you)用are,is跟着他(he),她(she),它(it)。单数名词用is,复数名词全用are。变否定,更简单,be后n
3、ot加上去。变疑问,往前提,句末问号莫丢弃。还有一条须留意,句首大写莫遗忘。Unit 2名词单数变复数 1.绝大多数的可数名词的复数形式,是在该词末尾加上后辍-s。读音改变:结尾是清辅音读s,结尾是浊辅音或元音读z。例:friendfriends; catcats; stylestyles; sportsports; piecepieces 2.凡是以s、z、x、ch、sh结尾的词,在该词末尾加上后辍-es构成复数。读音改变:统一加读iz。例:busbuses; quizquizzes; foxfoxes; matchmatches; flashflashes 3.以辅音字母+y结尾的名词,将
4、y变更为i,再加-es。读音改变:加读z。例:candycandies; daisydaisies; fairyfairies; ladyladies; storystories 4.以-o结尾的名词,假如不是外来词或缩写,就加-es,否则加-s构成复数。读音改变:加读z。例:tomatotomatoes; potatopotatoes; torpedotorpedoes; bingobingoes 反例:silosilos; pianopianos(外来词); photophotos; macromacros(缩写词) 5.以-f或-fe结尾的名词,多为将-f或-fe变更为-ves,但有例外
5、。读音改变:尾音f改读vz。例:knifeknives; lifelives; leafleaves; staffstaves; scarfscarves 反例:roofroofs 6.部分单词的复数形式不变 读音改变:保持原音。例:fishfish; sheepsheep; cattlecattle; deerdeer; salmonsalmon 7.极少数单词,其复数形式没有任何规律 读音改变:没有规律。例:manmen; womanwomen; childchildren; personpeople; oxoxen 8.一些单数词得加en才能变成复数词 例:oxoxen; childch
6、ildren; brotherbrethren 9.一些单数词得改头换面一番,才能变成复数词 例:analysisanalyses分析; basisbases基础; datumdata数据; footfeet; formulaformulae/formulas公式; goosegeese; mousemice; mediummedia/mediums媒介; toothteeth; womanwomen 12.一些名词虽分单数、复数,但出现次数多的总是单数词 例:clothing; film; help; furniture家具; machinery机械 13.另一些名词则以复数词出现的机会较多
7、 例:bellows风箱; clothes; police; shorts短裤; shears大剪刀 trousers长裤; wages工资 pound nouns,这类复数词是以主要的名词来表示。例:daughter-in-lawdaughters-in-law 媳妇 father-in-lawfathers-in-law岳父 son-in-lawsons-in-law 继子 15.若表达详细数目,要借助数量词 例:pair(对,双); suit(套); a pair of glasses; two pairs of trousers 20.另外还有一些名词,其复数形式有时可表示特殊意思,例
8、:goods货物,waters水域,fishes(各种)鱼 除人民币元、角、格外,美元、英镑、法郎等都有复数形式。例:a dollar, two dollars; a meter, two meters Unit3 人称代词和物主代词 1.人称代词 表示“我”、“你”、“他”、“她”、“它”、“我们”、“你们”、“他们”的词,叫做人称代词。人称代词有人称、数和格的改变,见下表: 人称代词主格:作主语,表示谁怎么样了、干什么了。I am a teacher. You are student. He is a student, too. We/You/They are students. 人称代词宾格作宾语,表示动作行为的对象。Give it to me. Lets go (lets =let us) 2.物主代词 表示全部关系的代词叫做物主代词,也可叫做代词全部格。物主代词分形容词性物主代词和名词性物主代词二种,其人称和数的改变见下表。 形容词性物主代词(my/your/his/her/its/our/their)+名词 而名词性物主代词则相当于形容词性物主代词+名词,故其后不必加名词。如: Is this your book? No,,it isnt, its hers(her book) This pen is mine.