人教版 (新课标)选修7&8Unit 4 Sharing示范课ppt课件
展开第四学时 Grammar
语 法 精 讲
过去分词作状语可表示时间、结果、原因、条件、让步、伴随等,表被动意义,相当于一个状语从句。1.Offered_help,ne ften said “thank yu”.(=When ne was ffered help,ne ften said “thank yu”.)过去分词短语作时间状语。2.Given_mre_time,he wuld finish the jb.(=If mre time was given t him, he wuld finish the jb.)3.Seen_frm_the_hill,the twn lks beautiful.(=If the twn is seen frm the hill,it lks beautiful.)
第2、3句中的过去分词短语相当于条件状语。4.He came back at midnight,tired_and_badly_wunded.(=He came back at midnight and he was tired and badly wunded.)过去分词短语相当于伴随状语。
二、连词+分词(短语)
为了使分词短语与主句关系更清楚,可在分词前加连词,常用的连词有:nce,when,while,if,thugh,althugh,after,befre,as等。1.Once_tasted,the dish is hard t frget.(=Once the dish is tasted,it is hard t frget.)2.If_heated,ice can be changed int water.(=If ice is heated,it can be changed int water.)3.Thugh_tld_many_times,he didn't understand it.(=Thugh he had been tld many times,he didn't understand it.)
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