八年级英语下册 Unit5 Section A课件 人教新目标版

1、enjoy the song if i am happy, i will smile.if they are happy ,they will sing and dance.section aunit 5 if you go to the party, youll have a great time !一条牛仔裤一条牛仔裤 a pair of jeans let sb in 让某人进入（来）让某人进入（来）是动副结构是动副结构代词是宾语时必须放在代词是宾语时必须放在中间中间。其反义词为其反义词为let sb out让某人出让某人出去去别让那个男孩儿进来！别让那个男孩儿进来！dont let t

2、he boy in !让他出去！让他出去！let him out. organize the party games组织聚会游戏组织聚会游戏what will happen tomorrow ?it will be sunny tomorrow.they will play football tomorrow.用用ifif合合并并成成一一句句they will play football if it is sunny tomorrow.if it is sunny tomorrow, they will play football.ifiswill be如果明天下雨，我将弹钢琴。如果明天下雨，

3、我将弹钢琴。if it is rainy tomorrow, i will play the piano. be rainy play the pianolook at the picture and make up sentences using “if”.exercise healthy如果我锻炼，我将健康。如果我锻炼，我将健康。if i exercise, i will be healthy.when do you get up on weekends?(9:00)i get up at 9:00 on weekends. what will happen if you get up a

4、t 9:00 this morning ? (if i ,i will)if i get up at 9:00, i will be late.i will be late if i get up at 9:00.what will happen if you are late for school?(if i,my teacher will )if i am late for school, my teacher will be angry with me.my teacher will be angry with me if i am late for school. teacherwha

5、t will happen if your teacher is angry with you?(if my teacher ,i will)if my teacher is angry with me, i will be sad.i will be sad if my teacher is angry with me.what will happen if you get up at 9:00 this morning ?if i get up at 9:00, i will be late.if i am late, my teacher will be angry with me.if

6、 my teacher is angry with me, i will be sad.if i am sad, i will talk with my best friend.if “如果如果”， 引导的条件状语从句引导的条件状语从句1 时态主将从现时态主将从现主句一般将来时，从句一般现在时主句一般将来时，从句一般现在时2 条件状语从句通常由连词条件状语从句通常由连词if引导，意为引导，意为“如果、如果、假如假如”，主句不能用，主句不能用be going to表示将来，而应表示将来，而应该用该用will, shall(主语为第一人称）主语为第一人称） 1. if she ( come) he

7、re tomorrow, i (ask) her to call you. 2. if we (work) harder, we (get) better eswill askworkwill getwhat will happen if you sleep in class?if i_ in class, i _ (get) bad grades.i will get bad grades if i sleep in class.sleep will get 温馨提示温馨提示: : if if引导的引导的条件状语从句既可放条件状语从句既可放在主句前在主句前, ,也可放在主也可放在主句后句后.

8、 .从句置于主句前从句置于主句前时时, ,须有逗号与主句隔须有逗号与主句隔开开, ,反之则不用逗号反之则不用逗号. .if i _computer games on weekdays , i _(be) very tired in class.i ll be very tired in class if i play computer games on weekdays.what will happen if you play computer games on weekdays?play will beif i _ hard, i_ (get) good grades.i will get

9、good grades if i study hard.what will happen if you study hard?studywill get(1 ) if will she, call me, i, tell her about itif she calls me, i will tell her about it.(2) he,have free time, go to shanghai ,(3) i ,have much money ,buy a big houseif he has free time, he will go to shanghai.if i have muc

10、h money,i will buy a big house.make up sentences using “if”.a: i think i am going to the party.b: if you do, you will have a great time.=if you go to the party, you will have a great time.1a look at the pictures. then match the statements with responses.1. i think im going to go to the party with ka

11、ren and ann.2. i think im going to wear jeans to the party.3. i think im going to take the bus to the party.4. i think im going to stay at home.a. if you do, the teachers wont let you in.b. if you do, youll be late.c. if you do, youll be sorry.d. if you do, youll have a great time.牛仔裤牛仔裤1b listen. w

12、ere your answers to activity 1a correct?a: what are you going to do ?b i think im going to stay at home.a: if you do, youll be sorry.1ca: what are you going to do tomorrow?b: i think im going to .a: if you do, you will.stay at homeboredwork until nighttiredhang out with friends/have a good time2a li

13、sten and number these phrases in the order you hear them. （听对话，按听到词组的顺序编号。）（听对话，按听到词组的顺序编号。）a. study for their testsb. help me organize itc. too earlyd. make some foode. saturday afternoonf. play party games123456andreamark2b: listen again and answer the questions.what will happen if they have the p

14、arty today?what will happen if they have the party tomorrow?what will happen if they watch a video at the party?what is mark going to organize?what is andrea going to do?mark is going to organize the party games.some students will be bored.students will leave early to study for their test.half the c

15、lass wont come.andrea is going to make some food.markandrea half the class wont come. 一半的同学将不会来。一半的同学将不会来。half的用法：的用法：1 half adj. 一半的，一般要放在冠词、物主代词或指示一半的，一般要放在冠词、物主代词或指示代词之前。半小时代词之前。半小时_“half + 名词名词” 作主语时，谓语动词的单、复数形式由所作主语时，谓语动词的单、复数形式由所接名词的单、复数形式来决定，名词是中心词。接名词的单、复数形式来决定，名词是中心词。 half the apples_ bad.

16、这些苹果中有一半是坏的。这些苹果中有一半是坏的。half the apple _ bad. 这个苹果一半是坏的这个苹果一半是坏的 2 half 还可作名词，意为还可作名词，意为“半，一半半，一半”其复数形式为其复数形式为_.“个半个半”可表达为可表达为“数词数词 + 名词名词 + and a half”或或“数词数词 + and a half + 名词（复数名词（复数）”。例如：。例如：三个半小时三个半小时 three hours and a half three and a half hours half an hour areishalves2c pairwork look at the

17、chart and role play the conversation between andrea and her friend.a: ok, when is a good time to have the party?b: lets have it today.a: if we have it today, half the class wont come.when is a good time to have the party? 举行聚会的最佳时间是在什么时候？举行聚会的最佳时间是在什么时候？ to have the party是动词不定式作后置定语，修是动词不定式作后置定语，修饰名

18、词饰名词time不定式作定语时，常放在被修饰的词语之后不定式作定语时，常放在被修饰的词语之后. would you like something _?a. drink b. drinking c. to drink d. drinks . i have a lot of homework _.a. do b. doing c. did d. to docdexercisesfill in the blanks with the words given.1.the students will go to the great wall if it _ (not rain) tomorrow.2.i

19、f he _ (not do) his homework, hell be late.3.if she likes it, she _ (read) it soon.4.if you play computer games on weekdays, you _ (be) tired.5.if you watch tv tonight, you _ (not study) for the test.doesnt raindoesnt dowill readwill bewont studyi dont know if my brother_ (come) tomorrow. if he_ (co

20、me), ill be happy.注意宾语从句中的注意宾语从句中的if与条件状语从句与条件状语从句if的区的区别。宾语从句中的别。宾语从句中的if“是否是否”相当于相当于 whether，宾语从句通常位于主句之后。引，宾语从句通常位于主句之后。引导宾语从句，时态需根据语境确定。导宾语从句，时态需根据语境确定。我不知道明天是否会下雨。我不知道明天是否会下雨。 i dont know if it_ (rain)tomorrow. will comecomes will rain 用所给词的正确形式填空。用所给词的正确形式填空。1.if you _ (be) late, the teacher w

21、ill be angry.2.we dont know if it _ tomorrow (snow).3.he _(become) a soccer player if he works hard.4. you _(be) famous if you sing well.arewill snowwill becomewill be5 half of these bananas _(be) bad.6 half of the boys _(like) basketball.arelikemake a surveyask three students: what will you do if we have no lessons tomorrow？then make a report like this