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1、Unit 2This is my sister.七年级英语上册（浙江地区）第三课时Section A (Grammar Focus3c)单元同步语法精讲be动词的变化：am或is变为are。eg：Im a girl.我是一个女孩。We are girls.我们是女孩。可数名词的变化：可数名词单数变为复数时，要注意以下变化规则。一般情况下词尾加s。eg：bookbooks书；penpens钢笔以s，x，ch，sh结尾的词加es。eg：busbuses公共汽车；watchwatches手表以o结尾的词加s或es。eg：photophotos照片；tomatotomatoes土豆以辅音字母加y结尾的
2、，将y变i，再加es。eg：familyfamilies家庭以f或fe结尾的单词，将f或fe变为v，再加es。eg：leafleaves叶子；knifeknives刀子一去：即名词前不定冠词a/an要去掉。eg：This is a ruler.这是一把尺子。These are rulers.这些是尺子。一坚持：即原句中的形容词、定冠词the、副词、介词短语等保持不变。eg：What color is the jacket？这件夹克衫是什么颜色？What color are the jackets？这些夹克衫是什么颜色？Who引导的特殊疑问句Who引导的特殊疑问句通常用来询问人的身份。常用句型“
3、Who is人称代词主格单数？/Who are人称代词主格复数？”。【注意】其回答形式应为“人称代词主格is/are.”，不能回答为“It is/This is/That is/These are/Those are.”。单元同步语法精练一、语法填空基础训练。1These are my _(friend)2Who _(be) these girls?3Its _(she) bike.4 _(That) two boys are David and Dale.5Are _(this) girls your friends?friendsareherThosethese6Is _(he) fath
4、er a teacher?7She and I _(be) good friends.8Your fathers parents are your _(grandparent)9This is _(I) sister.10Who are _(it)?hisaregrandparentsmythey二、按要求完成句子。11That is my pen.(改为一般疑问句并作否定回答)_your pen?No，_12These are his rulers.(改为一般疑问句并作肯定回答)_his rulers?Yes，_Is thatit isntAre thesethey are13Theyre
5、my sisters.(改为单数句)_my _14That is a black key.(改为复数句)_black _15Are those jackets？(改为单数句)_that_?16Those are my_parents(对画线部分提问)_those?ShessisterThose arekeysIsa jacketWho are17She is her_mother(对画线部分提问)_she?18他们是谁？他们是我的朋友_my _19这些是你的父母吗？_your parents?20那是我的哥哥托尼。_my brother Tony.Who isWho are they?TheyrefriendsAre theseThat is
