1、Grammar and usageUNIT 2 Lets talk teensGrammar and usageSimple，compound and complex sentences简单句、并列句和复杂句简单句 只有一个主语一个主语（或并列主语）和一个一个谓语动词（或并列谓语动词）的句子称为简单句（simple sentence）。Successful learners are learners with a specific purpose.学得好的人都有明确的学习目的。Voices and music have been added to colorful pictures to ca
2、tch the ear as well as the eye.彩色画面配上声音与音乐，既好听又好看。并列句并列句 l 两个或两个以上的简单句用并列连词（或用分号、冒号或逗号等）连在一起构成的句子叫并列句（compound sentence）。l 常用的连词有：and（和），so（因此，所以），not only.but also（不仅而且），neither.nor（既不也不），or（或者，否则），otherwise（否则），either.or（不是就是），but（但是），yet（然而），still（仍然），however（然而），while（而），whereas（而，反过来），for（因为，由于
3、）等。l The light was red，so I had to stop my car.是红灯，所以我不得不把车停下。l He is well over sixty，but he does not look old at all.他已年过花甲，但毫不显老。l Here the water is quiet，for there is little wind.这里水面平静，因为几乎没有风。复杂复杂句句 l The purpose of a test is to show what you have learned about a subject.l 测试的目的是了解你对某门课程学习的情况。（
4、关联词what 引导宾语从句）l Most adults who are learning a foreign language would disagree with the statement.l 多数正在学习外语的成年人不会同意这种说法。（关联词who 引导定语从句）由一个主句和一个或一个以上的从句所构成的句子结构叫复杂句（complex sentence），也叫主从复杂句。从句由关联词引导，关联词将从句与主句联系在一起。判断句子结构判断句子结构简单句、并列句和复杂句简单句、并列句和复杂句She was aged six when she first went to school._I
5、asked him to come with me and he agreed._I have never met Carl before，nor have I heard of him._ You werent at the meeting yesterday to hear what other people thought about this problem._ You can either write to me or call me in my office._ We must hurry，or well be late for class._Bill often sleeps l
6、ate and has no time for breakfast._复杂句并列句并列句复杂句并列句并列句简单句复杂句并列句并列句复杂句并列句并列句复杂句并列句并列句复杂句(1)Heated arguments and cold silences are common between teenagers and their parents.(2)Teenagers physical changes may result in such family tensions.(3)It can be a big headache to balance your developing mental ne
7、eds too.(4)Although sometimes it may seem impossible to get along as a family,you can take action to improve the situation.(5)The key to keeping the peace is regular and honest communication.(6)The good news is that this stormy period will not last.(7)Everything will turn out all right in the end,an
8、d the changes and challenges of your teenage years will prepare you for adulthood.Quick judgement4,61,2,3,57Simple sentenceCompound sentenceComplex sentence1.A simple sentence is made up of one independent clause which has one subject-verb combination.2.A compound sentence contains two or more main
9、clauses.We use linking words such as and,or,but,so or for to link the clauses.3.A complex sentence contains one main clause and at least one subordinate clause.A subordinate clause can be the subject,predicative,object,attribute or adverbial of the sentence.Summarizing the rulesPart B1 on Page 21App
10、lying the rules1Your password should be at least eight characters long.This makes it difficult to guess.2Posts should not give out personal information.They should not include advertisements.3Describe your problems clearly.Other people can understand them easily.4The experts will reply to you.They s
11、ee your posts.5What do you think of our forum?Let us know.Your password should be at least eight characters long because this makes it difficult to guess.Posts should not give out personal information and they should not include dvertisements.Describe your problems clearly so other people can unders
12、tand them easily.The experts will reply to you as soon as/when/once they see your posts.Let us know what you think of our forum.Part B2 on Page 21Teresa：Im under a lot of stress these days（1）my parents are always comparing me with my friends.Theyre never satisfied（2）I do better than all my friendsin
13、 schoolwork，in hobbies，in everything!Jack：Thats terrible.I can see（3）youre anxious.You should tell your parents（4）youre trying your best.Theres no point in comparing you with others all the time.Everyone is unique.Teresa：I know，（5）my parents dont seem to understand that.（6）they continue like this，Il
14、l lose confidence in myself.Jack：I think your parents are too strict with you.Dont take a passive role in the relationship.Talk to them.Let them know（7）you feel.Sometimes，competition can push you to do better.Right now，its just making you anxious and having a bad influence on your performance.Teresa：Thank you，Jack.Ill try talking to my parents.Jack：Cheer up，Teresa.Theyll understand（8）everything will turn out all right!andbecausebuthowif thatunlesswhybecauseunlesswhythat butIf how andTHE END
