人教版高二英语必修五unit5 grammar课件（25张ppt)）

Book 5　 Unit 5 First aid GRAMMAR 英语中的省略有两种:一是替代省略,即用其他词代替句子中重复或相同的部分;二是结构省略。即根据语境需要,承前或后省略句子中相同的某些句子成分。这类题型在历届高考试题中屡见不鲜。为了使讲话和行文简洁，句中某些成分有时可省略。省略可分以下几种情况： 一简单句中的省略 1、省略主语：祈使句中主语通常省略。其它省略主语多限于少数现成的说法。 e.g. (I) Thank you for your help.（括号内为省略的词语，下同） (I) See you tomorrow. (It) Doesn’t matter. 2、省略主谓语或主谓语的一部分。 e.g. (There is) No smoking. (Is there) Anything wrong? Why (do you) not say hello to him? 3、省略作宾语的不定式短语，只保留to。 e.g. ---- Are you going there? ---- I’d like to (go there). He did not give me the chance, though he had promised to (give me the chance). (动词:want, wish, expect, hope, like, love, try, forget, decide, prefer, mean, intend, plan, refuse…等动词宾语。 tell, ask, want, expect, warn…等动词的宾补。 形容词： glad, happy, pleased, delighted, … 短语：be going to, be about to, be able to, have to, used to, ought to, …) 注意：如果该宾语是be动词或完成时态， 则须在to之后加上be或have。 e.g. ---- Are you an engineer? ---- No, but I want to be. ---- He hasn’t f