2. am , is , are的选择: 单数用is , 复数用are， I 用 am , you 用 are.
3. have , has 的选择: 表示某人有某物。单数用has , 复数用have, I \\you 用 have . 4. there is, there are 的选择:表示某地有某物或某人。单数用there is , 复数用there are.
5.some, any 的选择:肯定句用some, 疑问句和否定句用any.
6. 疑问词的选择:what (什么) who (谁) where (哪里) whose (谁的) why（为什么）when(什么时候）which（哪一个）how old (多大) how many （多少）how much（多少钱）
二：形容词比较级详解
当我们需要对事物作出比较时，需要用到比较级。比较级的句子结构通常是： 什么 + 动词be (am , is , are ) + 形容词比较级 + than（比）+ 什么 ,如： I‘m taller and heavier than you. （我比你更高和更重。） An elephant is bigger than a tiger. （一只大象比一只老虎更大。） 形容词的比较级是在形容词的基础上变化而来的，它的变化规则是： ① 一般的直接在词尾加er ，如 tall - taller , strong - stronger , ② 以e结尾的，直接加r ，如 fine – finer ,
③ 以辅音字母加y结尾的，先改y为i再加er，如funny - funnier ④ 双写最后的字母再加er，如big – bigger, thin – thinner ,hot – hotter ☆ 注意☆ 比较的两者应该是互相对应的可比较的东西。 典型错误：My hair is longer than you.（我的头发比你更长。）
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比较的两者是我的头发、你（整个人），那么比较的对象就没有可比性。 应该改为：My hair is longer than yours. 或My hair is longer than your hair. 比较级专项练习:
一、从下面中选出合适的单词完成句子 heavy tall long big (1) How is the Yellow River? (2) How is Mr Green? He‘s 175cm. (3) How are your feet? I wear size 18. (4)How is the fish? It‘s 2kg. 二、根据句意写出所缺的单词
(1) I‘m 12 years old. You‘re 14. I‘m than you. (2) A rabbit‘s tail is than a monkey‘s tail. (3) An elephant is than a pig. (4) A lake is than a sea.
(5) A basketball is than a football.（贵的） 三、根据中文完成句子.
(1) 我比我的弟弟大三岁. I‘m than my brother. (2) 这棵树要比那棵树高. This tree than that one. (3) 你比他矮四厘米. You are than he. (4) 谁比你重? than you？
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四、根据答句写出问句
(1) I‘m 160 cm. (2) I‘m 12 years old. (4) Amy‘s hair is 30 cm long. 三：动词第三人称单数形式详解
第三人称单数形式加s 或es(动词第三人称单数形式一般直接加s， 以ch，sh，s，x，o等结尾的加es, 以辅音字母加y结尾的变y为i再加es，如studies；特殊变化have 变has )
She cleans streets. He helps sick people. She reads newspaper every day. He watches TV at home. He goes to work by subway. He is a teacher. He teaches English. My pen pal lives in Beijing. He studies hard.(他努力学习) She has a happy family. （她有一个快乐的家庭） 四：动词过去式详解 动词的过去式的构成规则有： Ａ、规则动词
① 一般直接在动词的后面加ed：如 worked , learned , cleaned , visited ② 以e结尾的动词直接加d：如 lived , danced , used
③ 以辅音字母加y结尾的动词要改y为i再加ed（此类动词较少）如 study – studied carry – carried worry – worried （注意play、stay不是辅音字母加y,所以不属于此类）
④ 双写最后一个字母（此类动词较少）如 stopped
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Ｂ、不规则动词（此类词并无规则，须熟记）小学阶段要记住以下动词的原形和过去式：
sing – sang , eat – ate ,see – saw , have – had , do – did , go – went , take – took , buy – bought , get – got , read – read ,fly – flew , am/is – was ,are – were , say – said , leave – left , swim – swam , tell – told , draw – drew , come – came , lose – lost , find – found , drink – drank , hurt – hurt , feel – felt 五：动词现在分词详解 动词的ing形式的构成规则：
① 一般的直接在后面加上ing , 如doing , going , working , singing , eating ② 以e 结尾的动词，要先去e再加ing，如having , writing
③ 双写最后一个字母的（此类动词极少）有：running , swimming , sitting , getting 六：动词的几种时态
1、现在进行时：表示说话人说话时正在进行的动作。（与now连用） 构成：助动词be（am is are）的人称形式+现在分词（动词+ing） 第一人称 第二人称 第三人称 单数 I am walking. 复数 We are walking. You are walking. You are walking. He is walking. She is walking. It is walking. They are walking. 2、一般过去时：表示过去的动作或状态，常有明确的时间状语。 如：last weekend, yesterday.
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