高中英语选择性必修二 Unit 5 First aid Period 3 Discovering useful structures（课件）.pptxVIP

人教版 选择性必修二Unit 5 First AidPeriod 3 Discovering useful structuresThe usage of the –ing formThe usage of the –ing formV-ing 形式构成:V-ing 形式由 “do＋ing” 构成, 其否定形式是 “not doing”, V-ing 可以带宾语或状语构成 V-ing 短语, 没有人称和数的变化, 但有时态和语态的变化。　语态时态主动语态被动语态一般式完成式(not) doing(not) being done having been done(not) having done(not)作用1．作主语①直接置于句首Playing tricks on others is something we should never do．Learning new words is very important for me．②用形式主语it，把真正的主语ing形式移置句尾。但这种句子形式有一定的限制，作表语的只能是某些形容词或少数名词。It’s worth making the effort.Its no use crying over spilt milk.It’s useless arguing with him.2.v-ing形式作表语-ing形式作表语时放在系动词之后，用来指某种动作或行为，以说明主语的内容、身份、性质或情况。如：Her hobby is painting. My job is looking after the children.His concern for his mother is most moving. Frank is very good at telling funny jokes. He can be very amusing.Have you considered looking for a friend to help you?I tried to avoid meeting him.①只能后接动名词作宾语的动词，常见的有avoid, admit, appreciate, complete, consider, delay,??deny, dislike, enjoy, escape, excuse, fancy, finish, forgive, imagine, keep, mention, ?mind, miss, practise, risk, suggest, understand　常跟doing的短语can’t help, put off, give up, cannot stand, insist on, keep (on), feel like, prefer…to, lead?to, devote?…?to, object?to, stick?to, look forward to, pay attention to, get down toDo you mind passing me the book ?His coming home late made his mother worried接doing 的其它结构have trouble/difficulty (in) doing There is difficulty /trouble (in) doing spend/waste…(in) doingbe busy( in) doingIt is no good/use doing (there is no good doing)I find it no good doingbe worth doingThere is no point/sense in doingThere is no need to do②既可接动名词又可接不定式作宾语的动词A.接doing 和to do意思基本相同的常见的有: like，love，hate，prefer，continue, begin/startB.接doing 和to do意思不同的常见的有: forget，remember，regret，try，mean， go on, learn, cannot help, be used to, stopI remember posting the letter．I’ll remember to post the letter．I shall never forget seeing the famous writer．Don’t forget to write to your mother．I regret missing the report．I regret t