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1、8上 Unit 4,Study skills,完成句子。,1. 你应该在南京换火车。 _ change trains at Nanjing.2. 你最好在下雨前回家。 _ before the rain starts. 3. 现在你最好别打棒球了。 _ baseball now.4. 不要把金鱼放在阳光下。 _ the goldfish in the sun.,You should,Youd better go home,You had better not play,Dont put,happy,unhappy,not happy,polite,impolite,not polite,exp
2、ensive,inexpensive,not expensive,unhappy,impolite,inexpensive,un-,im-,in-,refix(前缀),A prefix is a letter or a group of letters that we add to the front of a word to form a new word.we add the prefixes un-,in- and im- to some adjectives to give them the opposite meaning.,friendly happy comfortable sa
3、fe healthy ,unhealthy,“un-”,kind lucky pleasant able tidyusual,untidy,unfriendly,unhappy,uncomfortable,unsafe,unkind,unlucky,unpleasant,unable,unusual,expensive correct completedirectactive inactive,inexpensive,incorrect,“in-”,possible patient proper,impolite,“im-”,incomplete,indirect,polite ,imposs
4、ible,impatient,improper,Work out the rule!,Work out the rule!,Discussion: Discuss with your partners about the rules to add the prefixes un-,in- and im-to some adjectives to form their opposites, please take notes while discussing.（讨论：请和你的同伴讨论在形容词前加上un-,in-和im-前缀构成反义词的规则,在讨论的时候请记好笔记）,Work out the ru
5、le!,Work out the rule!,Tip:,dis-,较常用的前缀 e.g. dishonest,1._ 是最常用的否定前缀2.否定前缀_常用在以字母“c”开头的单词前，3.否定前缀_常用在以字母“p 开头的单词前。,“un-”,“in-”,“im-”,从来都不会用在以字母l,r开头的单词前。,/b/m,friendly happycomfortablesafehealthy,unhealthy,kindluckypleasantabletidyusual,untidy,unfriendly,unhappy,uncomfortable,unsafe,unkind,unlucky,u
6、npleasant,unable,unusual,expensivecorrect completedirect,impoliteimpossibleimpatient improper,inexpensive,incorrect,incomplete,indirect,politepossiblepatientproper,Try to remember!,1._friendly 2._happy 3._correct 4._polite5._comfortable 6._safe 7._expensive 8._healthy9._usual 10._possible11._tidy 12
7、._common13._patient 14._able15._kind 16._complete17._ direct 18._ lucky 19._pleasant 20._proper,un,un,in,im,un,un,un,un,un,un,in,im,im,un,Check your memory!,un,in,un,un,in,im,Fill in the blanks with the right forms the words.,1.You should not point at someone else. That is_(polite).2.I am sorry to s
8、ay your answer is_(correct).3.It is _(friendly) to shut the door in ones face.4._(healthy) food does harm to people.5.Ive got a headache,so I feel very_(comfortable) now.6.Its_(safe) to play with fire.7.I wont go to that meeting, because it is _(important) to me. 8.It is_(possible) for him to do so
9、many things within so little time.,impolite,incorrect,unfriendly,Unhealthy,uncomfortable,unsafe,unimportant,impossible,Read the conversation below. Add the correct prefix to some of the adjectives so that all the sentences make sense. (P51),1.Annie:Do you spend a lot of time doing outdoor sports? Si
10、mon: Sure. Its usual for me to stay at home all day.2.Sandy:Our neighbour next door is putting something on the wall. Mum: Its possible to sleep with all that noise.,unusual,impossible,3.Millie:Are you able to fix your bicycle, Andy? Andy: No. Im certain that I can fix it myself.4.Mum: Suzy, your ro
11、om is really tidy-things are all over the floor. Suzy: Sorry,Mum. Ill tidy up right now.,uncertain,untidy,do outdoor sports,stay at home all day,our neighbour next door,all over the floor,tidy up,tidy it/them up,The boy is not very strong, he is always _ in sports.A. inactive B. active,A,not direct
12、_not kind _not possible _,indirect,unkind,impossible,unusual,The snow is so heavy. It is _ to see such heavy snow. So it is heavier than usual.,This isnt an important thing.=,This is an _ thing.,unimportant,Ask and answer:,1.Are the people in the movie friendly to the wild animals?No, they are_ to t
13、he wild animals.2.Wild animals are our friends. Is it correct to hunt them?No,it is_ to hunt them.,unfriendly,incorrect,It is imcorrect to read someone elses letter.David often says bad words to others, so he is inwelcome .Its infriendly to throw stones to birds.,incorrect,unwelcome,unfriendly,Corre
14、ct the mistakes:,1. 一些人对他们的邻居不友好。 2. 没有可能起得那么早。 3. 许多穷人住在小而不舒服的房子里。 4. 你将不能看到格林先生。 5. 他不喜欢运动，因此他不健康。,翻译句子，挑战自我,Some people _ their _.,Its _ to _ so early.,Many poor people live in _houses.,You _ to see Mr. Green.,He _ to exercise, so he is _.,are unfriendly to,neighbours,impossible,get up,small and uncomfortable,will be unable,doesnt like,unhealthy,句子翻译：他不诚实，所以没人喜欢他。,He is dishonest, so nobody likes him.,Homework,1.Remember the adjectives with the prefixes un-,im- and in- we learned today.2.Try to find out more adjectives with the prefixes un-,im- and in- .,
