Unit 4 Grammar and usage课件-2023-2024学年高中英语牛津译林版（2020）必修第三册.pptx

;Review;pastparticipleasattributives;1.不及物动词的-ed形式作定语,有主动和完成意义。

eg.Theroadiscoveredwithfallenleaves.

=Theroadiscoveredwithleavesthathavefallen.

2.及物动词的-ed形式作定语,一般兼有被动和完成的意义。

eg.Usedcarsarelessexpensive.

=Carsthathavebeenusedarelessexpensive.

;3.单个动词-ed形式作定语，常置于被修饰词之前；动词-ed形式短语作定语，常置于被修饰词之后。

eg.Heisarespectedteacher.

Thescientificadvancesmentionedinyourarticleareinteresting.;fallenleaves;;情感动词的V-ing表“令人…...”,V-ed表“感到…...”;Practice;pastparticiple

asadverbials;过去分词作状语来源于状语从句，在句中一般能作五种状语，即时间、原因、条件、让步和方式状语。如：

;作条件状语

Givenmoretime,wewouldbeabletodotheworkmuchbetter.

=Ifweweregivenmoretime,wewouldbeabletodotheworkmuchbetter.

作让步状语

Leftaloneathome,thelittleboydidntfeelafraidatall.

=Althoughhewasleftaloneathome,thelittleboydidn’tfeelafraidatall.

作伴随或方式状语

Theteacherenteredtheclassroom,followedbysomestudents.

=Theteacherenteredtheclassroom,andhewasfollowedbysomestudents.

;V-ed作状语有时可保留连词，构成“连词+V-ed”结构，即:

while,when,once,as,though,unless,if等连词)+V-ed。;现在分词与过去分词作状语的区别;Practice;pastparticiple

asobjectcomplements;动词-ed形式可在see、hear、notice、feel、have、make、keep、leave等动词后作宾语补足语。如：

IhaveneverheardthissongsunginEnglish.;Practice;Applyingtherules;ReadthesciencemagazinearticleonP48andanswerthefollowingquestion.;PleasecompletethetableinpartA.;Workingouttherules;Rewritethefollowingsentencesusingaverb-edformasanattributives,adverbialorobjectcomplement.;4.Thescientistfoundthattheequipmentinthelaboratoryhadbeendestroyed.