初中英语被动语态知识点总结ppt.pptx

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,8/1/2011,#,初中英语被动语态知识点总结,目录,Basic Concepts and Composition of Passive Voice,The application of passive voice in different tenses,Passive voice with modal verbs and auxiliary verbs,Techniques for using passive voice in special sentence structures,目录,Practical Exercise:Identify and Rewrite to Active or Passive Voice,Summary,Review,and Extension,01,Basic Concepts and Composition of Passive Voice,Passive voice is a grammatical voice that indicates that the subject of the verb is being acted upon by the verbs action,rather than performing it.,Definition,Passive voice is often used to place the focus on the action being performed,rather than on the person or thing performing the action.It can also be used to create a more objective tone.,Function,Definition and Function,03,Use of by phrase,The agent of the action can be introduced with a by phrase,but it is not always necessary.,01,Basic structure,Subject+be verb+past participle,02,Variations,Passive voice can be formed with different tenses,such as present passive,past passive,and future passive.,Passive voice structure form,Regular verbs,Most verbs form the passive voice by adding-ed to the base form of the verb.,Irregular verbs,Some verbs have irregular past participles that must be learned individually.,Phrasal verbs,Phrasal verbs(verbs combined with prepositions or adverbs)can also be used in passive voice,but the preposition or adverb may need to be moved to a different position in the sentence.,Verb variation rules,Overuse,Passive voice should not be overused,as it can make sentences wordy and less direct.,Omission of by phrase,Sometimes the agent of the action is omitted in passive voice sentences,but this should be done intentionally for stylistic reasons rather than by accident.,Incorrect verb forms,It is essential to use the correct past participle form of the verb when forming the passive voice.,Incorrect tense usage,It is important to use the correct tense when forming the passive voice,as the tense of the verb changes depending on the time frame of the action.,Notes and common errors,02,The application of passive voice in different tenses,am/is/are+past participle,Structure,to describe actions or states that happen regularly or generally in the present,Usage,The homework is done by the students every day.,Example,Present simple passive voice,Structure,was/were+past participle,Usage,to describe actions that happened in the past and are completed,Example,The book was written by the famous author last year.,The simple past passive voice,Example(past continuous):The movie was being filmed by the director at that time.,Example(present continuous):The house is being renovated by the workers now.,Usage:to describe actions that are in progress or were in progress in the present or past,respectively,Structure(present continuous):am/is/are+being+past participle,Structure(past continuous):was/were+being+past participle,Present continuous and past continuous passive voice,Structure(present perfect):have/has+been+past participle,Structure(past perfect):had+been+past participle,Usage:to describe actions that have been completed in the present or before a certain time in the past,respectively,Example(present perfect):The project has been completed by the team already.,Example(past perfect):The report had been submitted by the student before the deadline.,01,02,03,04,05,Present perfect tense and past perfect tense passive voice,03,Passive voice with modal verbs and auxiliary verbs,Modal verbs such as can,may,must,should can be used with be and the past participle to form the passive voice,indicating possibility,permission,necessity,or obligation.,Example sentences:The work can be done by tomorrow.This book must be returned to the library.,Modal verb+be+past participle structure,VS,Auxiliary verbs such as have,has,had,will,would can also be used with be and the past participle to form different tenses and voices of the passive voice.,Example sentences:The house has been sold.The project will be completed next month.,Auxiliary verb+be+past participle structure,The negative form of the passive voice is created by adding not after the modal verb or auxiliary verb.,The interrogative form is created by moving the modal verb or auxiliary verb to the beginning of the sentence and adding a question mark.,Example sentences:Has the homework been done yet?Shouldnt the trash be taken out now?,Negative and interrogative forms,04,Techniques for using passive voice in special sentence structures,Usage,This pattern is often used to express objective facts or rumors,where the real subject is not mentioned or unknown.The passive voice is used in the clause following It is said/reported/believed that.to focus on the action or event itself.,Example,It is reported that the new policy has been implemented in several cities.,Note,In this structure,It serves as a dummy subjec。