SectionⅢGrammar——非谓语动词语境自主领悟先观察原句后自主感悟①Itwasfoolishofyoutolietoyourteacher
②It'snousetryingtopersuadehimtochangehismind
③Ourdutyistohelptheyoungchildrentogrowbetter
④Ourworkisservingthepeople
⑤PeoplewanttoknowwhoMonaLisaisandwhysheissmiling
⑥Thebuildingbeingbuiltisanewshoppingmall
⑦Thebirdwasluckyandescapedbeingcaught
⑧PaintedbyLeonardodaVinciintheyear1503-1506,theMonaLisaisamysteriousmasterpiece
句①②中黑体部分在句中均作主语
句③④中黑体部分在句中均作表语
句⑤中黑体部分在句中作宾语
根据句①②可知,动词不定式和动词ing形式作主语时,可以用it作形式主语
句⑥⑦中,黑体部分为动词ing形式的被动式,在句中分别作定语和宾语
句⑧中黑体部分为过去分词在句中作状语
考点一非谓语动词和基本形式时态形式主动式被动式不定式一般式todotobedone完成式tohavedonetohavebeendone进行式tobedoing动词ing形式一般式doingbeingdone完成式havingdonehavingbeendone动词ed形式一般式done考点二非谓语动语的用法1.不定式和动名词作主语不定式作主语表示具体动作;动名词作主语通常表示抽象动作
Toswimintheseainhotsummerisverypleasant
炎热的夏季在海里游泳很惬意