必修五第三单元 过去分词用作状语
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人教高中英语必修5unit3过去分词作状语【传授内容】已往分词作状语【传授目标】熟练掌握已往分词作状语的用法【传授重难点】和现在分词作状语时的区别【传授历程】*已往分词作状语,表示行动产生的背景或环境,在意义上相当于一个状语从句。
已往分词在句中作状语可以作状语可以表示时间、条件、方法、让步、原因、终于等。
*动词的-ed形式:与句中主语为逻辑上的被动干系一、表示时间动词的-ed形式可置于句首,也可置于句尾,有时还可以置于主语和谓语之间例:当问到有关他的家庭环境时,他没有回答。
1.When he was asked about his family,he made no answer.→Asked about his family, he made no answer.→He, asked about his family, made no answer.→He made no answer,asked about his family.【活学活用】把下列状语从句改为已往分词作时间状语1.When he was asked why he was late, he went red.→Asked why he was late,he went red.2.When water is heated,water changes into steam.→Heated,water changes into steam.二、表示条件表条件的状语常位于句首例:从远处看,这个村庄看上去更英俊。
1.If the village is Seen in the distance, the village looks more beautiful.→ Seen in the distance, the village looks more beautiful.【随即随练】把下列状语从句改为已往分词作条件状语1.If we were given more time and money,we would have done the work better.→Given more time and money,we would have done the work better.2.If I was compared with you, I still have a long way to go.→Compared with you, I still have a long way to go.三、表示原因表示原因的分词短语一般置于句首,偶然置于句尾或句中例:1.由于伤得严重,只好把他送往医院。
[语法初识]原句感知自主探究1.①Worried about the journey, I wasunsettled for the first few days.②Given better attention, the trees could grow better.③Described as an enormous round plate, it spins slowly in space to imitate the pull of the earth’s gravity.2.①Hit by a lack of fresh air, my head ached. (1)作状语用的过去分词(短语)和句子的主语之间是逻辑上的动宾关系,或称为被动关系。
(2)第一组句子中的过去分词(短语)分别在句子中作:①原因状语;②条件状语;③伴随情况或方式状语。
=Because I was hit by a lack of fresh air,my head ached.②I stared at the moving model of the waste machine, absorbed by its efficiency.=I stared at the moving model of the waste machine, and was absorbed by its efficiency. 3.①When offered help, one often says“Thank you”or“It’s kind of you.”②The research is so designed that once begun nothing can be done to change it. (3)比较第二组句子可知,作状语用的过去分词(短语)可以转化成相应的状语从句或并列句。
(4)从第三组句子可知,表示时间、条件、方式、比较或让步的状语,可用“从属连词+过去分词”结构。