新概念二册45课(共42张PPT).ppt

;A clear conscience 问心无愧;;;;First watch the video and then answer the question.;看视频，然后回答以下问题。 How did Sam get his money back?;;;Watch the video again and pay attention to the intonation and pronunciation.; The whole village soon learnt that a large sum of money had been lost. Sam Benton, the local butcher, had lost his wallet while taking his savings to the post office. Sam was sure that the wallet must have been found by one of the villagers, but it was not returned to him. Three months passed, and then one morning, Sam found his wallet outside his front door.; It had been wrapped up in newspaper and it contained half the money he had lost, together with a note which said: A thief, yes, but only 50 per cent a thief! Two months later, some more money was sent to Sam with another note: Only 25 per cent a thief now! In time, all Sams money was paid back in this way. The last note said: I am 100 per cent honest now!;Ask and answer:; 被动语态 一、什么是语态？ 语态是英语动词的一种表现形式，用来说明主语和 谓语动词之间的关系。;;6)was/were being done 过去进行时  7)shall/will be done 一般将来时 8） should/would be done 过去将来时  被动语态的特殊结构形式?1）带情态动词的被动结构 其形式为：情态动词＋be＋过去分词。  ;5、主动语态变被动语态应注意的问题 1.把主动语态变为被动语态时，应保留主动语态原来 的时态。如：She often cleans the house. The house is often cleaned by her. 2.有些动词可以有双宾语，在用于被动结构时， 通常变为主语的是间接宾语（sb.） ;3) 当“动词+宾语+宾语补足语”结构变为被动语态时， 将宾语变为被动结构中的主语，其余不动. ;5) 有些相当于及物动词的动词词组， 如“动词＋介词”，“动词＋副词”等， 也可以用于被动结构，但要把它们看作一个整体， 不能分开。其中的介词或副词也不能省略。  ;一、系动词 taste, smell, feel, sound, prove 等可用主动形式表达被动意义。如:;二、某些与 can’t won’t 等连用的不及物动 词，如move, lock, shut, open 等可用主动 形式表达被动意义。如：;三、某些可用来表示主语内在品质或性能 的不及物??词，如 sell, write, wash, clean, last(耐久), wear(耐穿), 等可用主动形式表 达被动意义. 如:;五、形容词 worth 后面要用动名词的主 动形式表示被动意义。如：;四、在动词 require, need, want 等动词之 后，可用动名词的主动形式表示被动意义。;六、动词不定式的主动形式表示被动意义：;2. 在“系动词+形容词+不定式”结构中， 常见句型有：;课堂练习 （一）改写句子 1. We plant trees in spring every year. _________________ by us in spring every year. 2. She posted the letter yesterday. __________