人教版九年级英语第十三单元知识点总结

九年级英语13单元知识点综述单位13。were trying to save the manatees！1.单词litter bottom fisherman cool ugly advantage cost wooden plastictake away bin shark fin cruel harm ful be harm ful to at the top of chain the food chain e.down upside gate bottle president inspiration iron work metal bring back creativity二. 1 .目前正在进行中定义：表示说话时(瞬间)正在进行的动作，表示当前阶段或当前阶段始终在进行的动作。结构： 肯定句：主题am/is/are V-ing否定句：主题am/is/are not V-ing疑问句： Am/Is/Are主题V-ing用法：1)说话时表示现在正在进行的、现在正在发生的行动。 Look！The big bird is flying away。 he is watching a movie now。(2)表示目前进行了一段时间，但说话时可能没有进行的行动。right now I am studening Chinese by distance learning。我现在通过远程教育学汉语。(1) 2)经常附有表示现在时刻的时间副词。例如：now、right now、at the (very) moment、for the time being、at present、these days and Look！Listen！3)与always、constantly、forever、all the time等副词结合使用，表示动作重复或习惯。此时，句子常常包含演讲者强烈的感情。表达强烈的“谴责”或“称赞”的意思。 You are always changing your mind。你总是想不起来。(太烦人了) He is always helping others。他总是帮助别人。他真是个好人4)表示come、go、leave、arrive、start、fly、drive等位置移动的动词经常使用未来时态表。 he is leaving on Wednesday。 Mary isnt here at the moment。she is coming later。Used to do请参阅第四个单位和使用手动语音请参阅第五单元。注：接收双对象的单词的被动语态；Make /let /have sb do中的手动语音；see/hear/notice/find/observe sbdo中的手动语音；it s said/reported/believed/supposed/well-known；三种情况(感觉动词、自动动词、sell/write等)4.现在完工时：用法：过去发生的动作对现在的影响或结果：强调结果Yesterday I finished my homework，thats to say，I have finished my homework now。从过去到现在持续的行动或状态：强调持续I have lived here since 1990。现在完成的配置have/has历史分词现在完成四个基本句型He has finished the work。一般疑问句Has he finished the work？否定句He has not finished the work。两个答案是yes，he has。no，he Han t .特别的疑问文What has he done？在以下情况下立即完成时使用1短语单词already已经是肯定的句子或句尾I have already found my pen。=I have found my pen already。叶特已经是否定句和疑问句结尾I have not finished the work yet。Have you bought a computer yet？ever是Have you ever seen pandas？never绝对不行I havenever been to beijin。刚才I have just done my work。before前句末I have never been there before。so far迄今为止So far he has learned 200 words。how long多久来一次How long have you lived here？How many times How many times has he been to Beijing？两个词组Havegone to beijin(去北京了，没有回去)我去过Havebeen to某个地方：He has been to Beijing。(去北京回来了)三种结构For two monthsFor排程期间Jim has lived here for 2 months。Since last yearSince过去的时间点Lucy has been in beijin since 3 years ago。Since 3 years agoSince 1990Since he came hereSince过去时态句子he has been in China since he came here。4如果句子里没有时间，汉语可以加“已经”，经常使用现在时态。Have you lost your library book？你已经把从图书馆借的那本书丢了吗？5完成状态现在经常用于以下句型：they have planted many trees in the last/past few years。This is the best book I have ever read .it is the first time I have played the computer games。现在完成的时候，一次性动词不能和副词一起使用示例：He has bought the book for 3 years。(错误)这个一次性动词在一段时间内不能和for 3 years一起使用，所以有以下方法：He has bought the book.(删除特定期间的for 3 years)He bought the book 3 years ago(切换到一般过去时不要更改句子的意思)it s/it has been 3 years since he bought the book .=3 years has passed since he bought the book。(固定句子it is/it has been - since-)He has had the book for 3 years。(连续性动词have代替buy)此外come/arrive/getto/reachbe hereI have come here for 3 years。而不是(错误)I have been here for 3 years。leave/go be awayHe has left for 3 hours。(无效)He has been away for 3 hours。begin/start be onThe film has begun for 3 minutes。而不是(错误)The film has been on for 3 minutes。open be open/close be closedThe shop has opened for 3 years。而不是(错误)The shop has been open for 3 years。die be deadHis father has died for 3 years。代替(无效)His father has been dead for 3 years。完成/结束 be overHe has finished the work for 3 days。而不是(错误)The work has been over for 3 daysjoin I have joined the army for 3 years。(错误)更改：I have been in the army for 3 years。或I have been a soldier for 3 years。buy /catch haveI have bought the bike for 3 years。更改为(错误):I have had the bike for 3 years。He has caught a cold for 3 days。代替(错误)He has had a cold for 3 days。borrow keepI have borrowed the book for 3 years。而不是(错误)I have kept the book for 3 years。其他摘要如下：breakbe broken get upbe up marrybe married becomebe losebe lost5.情态动词(1)情态动词本身有一定的意义，表示说话者的感情、态度或语气，但不能单独用作谓语，只能由其他动词和谓语组成。常见的是can (could)、may (might)、must、need、shall (should)和will (would)。情态动词没有人叫和数的变化，随后是动词的原型。否定式是在模态动词后加上not。个别情态动词有过去时态形式，也可以用来表达更礼貌、更委婉的语气。1.can和could的用法(1)can/could表示：“能力；“许可的可能性”等。Could是can的过去时态。示例：Can I use your bike？(2)可以在疑问句中使用，征求意见，请求许可，答词仍然用2)can。Could用于疑问句，比can更委婉、更礼貌，是礼貌的表现。不表示过去时态，在说话时使用can，但不能使用could。-Could you tell me the way to the zoo？-sorry.i cant.im new here。注意 can和could只能用于当前时态和过去时态，be able to可用于将来时态。此外，cant可以表示否定猜测。范例：that _ _ _ _ be Mr Wang。he has gone to beijin。2.may和might的用法May/might表示“可能”，表示同意、许可或对方的许可请求，也可以表示祝愿。May的否定形式为may not。Might是may的过去时态，有两种用途。一个表示过去时态。表达语气更委婉、礼貌或可能性较小的一种表达方式。以May开头的一般疑问句，其否定回答以mustnt代替may not进行。例如：_ _ _ _ _ _ _ I use your pen？我可以使用你使用的笔吗？You may put on more clothes。may you be happy！Might I borrow some money now？He might be alive。3.must的用法Must表示“必须，必须，必须”，表示说话者认为需要做什么，命令，要求别人做什么，对事物的猜测。否定型mustnt的意思是“不”、“一定不要”。例如：I _ _ _ _ _ _ fi