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1、 Unit2 How often do you exercise【Useful Phrases】一、 be good for 、be good at的相关用法1、be good for be bad for Doing morning exercise your heath .(对有益)Eating too much sugar your teeth.(对有害) 2、be good at (doing) sth = Li Ping is good at basketball.=Li Ping is good at (play)basketball.= Li Ping basketball.（擅
2、长于）3、 be good to The teachers are good to their students.老师对他们的学生很好。 My parents are good to (I) 二、want的用法：1、want sth. 2、want to do sth. 3、want sb. to do sth. want sth.中的sth.一般是名词，如apple, pencil, book, money等我想要点水。I want some water.我想吃一个苹果。I want an apple. 我想要两本书。I want two books.want to do sth.其中的do
3、是动词原形，表达主语想要做的动作。=feel like doing sth 我想要喝点水。I want to some water.( drink) I feel like some water.( drink) 我想要吃一个苹果。I want to an apple.(eat) I feel like an apple.(eat) want sb. to do. sth.其中的sb.是want的宾语，是主语想要这个宾语做某事。我想让我妈妈喝点水。I want my mother to drink some water.我想让她吃一个苹果。I want to eat an apple.（she
4、）他想让我买两本书。He want to buy two books.（I）三、 help用法举例help既可以作名词，也可以作动词。1. help作名词，意为“帮助”。eg: He needs some help.2. help作动词， “帮助” eg: Can you help me?3. help的结构：help sb (to) do sth =help sb with stheg:They want to help the boy ( carry) the heavy box.=They want to help the boy with the heavy box.四、try的用法1
5、.try to do sth 2.try doing sth She tried her hair with a new shampoo.（wash）她试着用一种新的香波洗头发。He didnt try it.（do）他不肯努力去干。please try this work in thirty miniutes.（finish）请尽量在30分钟完成这项工作。why didnt you try a bike to go to school?（ride）为什么不试着骑车去学校呢？五、.how often 用于询问动作或行为发生的频率，回答此类问题常可用twice a day（一天两次），once
6、a week(一周一次) eg: - How often do you come here? -I usually come once a week.But in summer holiday I come every day.频率副词Always usually often sometimes hardly never hardly ever【Grammar Focus】一般现在时英语中不同时间、方式发生的动作或状态要用谓语动词的不同形式来表示。这种表示动作或状态发生时间、方式的动词形式称为动词时态。（一）一般现在时的含义1. 表示现在的状态和状态，通常不带时间状语。 They are st
7、uents. 他们是学生。 Jack is twelve. 杰克12岁了。 She likes fish very much. 她喜欢吃鱼。 We speak Chinese. 我们讲汉语。2. 表示经常的或习惯性的动作。 I go to school at seven in the morning. 我早晨7点去上学。 I watch TV every day. 我每天看电视。 He goes shopping once a week.3. 表示客观真理、科学事实、格言等。 The sun rises in the east. 太阳从东方升起。 There are twelve months
8、 in a year. 一年有十二个月。（二）谓语动词的构成形式1. 谓语动词是be的。 肯定式：I am 否定式：I am not You are You are not She/ He/ It is She /He/It is not They/ We are They/ We are not 一般疑问句：Are you 简略回答：Yes, I am/ We are. No, I am not /We arent. Is he/ she/ it Yes, he/she/ it is. No, he /she/ it isnt. Are they /we Yes, they/ we are.
9、 No, they/ we arent. 小结 ： 动词be（is,am,are）的用法 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，更容易，be后not加上去。 变疑问，往前提，句末问号莫丢弃。 还有一条须注意，句首大写莫忘记。2. 动词do 以have 为例 肯定句：主语 + 动词原形 + 其他 I /We/ You/ They have friends. He/ She/ It has friends. 否定式：主语 + dont/doesnt + 动词原形 + 其他 I /We /You /T
10、hey dont have friends. He /She/ It doesnt have friends. 一般问句：Do/Does + 主语 + 动词原形 + 其他 Do you /we/ they have friends? Does she/ he/ it have friends? 简略回答： Yes, I /we /they/ you do. No, I /we /they /you dont. Yes, she/ he/ it does. No, she/ he/ it doesnt. （三）当主语是第三人称单数时,动词形式的变化规(1) 一般动词在词尾加_，在清辅音后读/s/
11、,在浊辅音后或元音后读/z/,在t后读/ts/，在d后读/dz/。(2)以字母o,s,x,ch,sh结尾的动词加_读/IZ/; (3).以辅音字母+y结尾的，_ 。 写出下列动词的三单形式：do_ play_ study_ like _ go_ teach _ finish_ fix _ 注意：be _ have _ 【典型例题】一、按要求完成下列句子1. I have a volleyball. （改为否定句） I _ _ a volleyball. 2. His brother has a baseball. （改一般疑问句） _ his brother _ a baseball? 3. Do your parents have a computer? （作出肯定回答） Yes, _ _. 4. Does Mary have a tennis racket? （作出否定回答） _, _ _. 5. Lucy has two brothers. （变否定句） Lucy _ _ two brothers. 6.Tom has two baseballs.(改为一般疑问句) 7.She doesnt have
