必修四 Unt 2 grammarVerb-ing Form as Subject and Object 课件.ppt

Verb-ing Form as Subject and Object;Welcome to our class!;LOVE;A SONG;一.V-ing 形式;二.V-ing 的用法： 1. 作主语 ① Doing + v. + … no use no good no fun ② It`s + a shame + doing a waste of time/money useless dangerous ③ There is no + doing...;e.g. ①Reading is important in learning English. ②Teaching the students well is a teacher’s job. ③It`s dangerous playing with fire. ④It`s a waste of time copying others homework. ⑤It`s no good staying up too late. ⑥There is no joking about the matter.;1．作主语 ①直接置于句首 1) 捉弄别人是我们万万不能干的. Playing tricks on others is what we should never do． 2)学习新单词对我来说非常重要。 Learning new words is very important for me． 3)说比做容易。 Talking is easier than doing.;②用形式主语it，把真正的主语V-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。 和他争辩是没有什么用的。 It is useless arguing with him． 这工作值得去做。 It’s worth/worthwhile doing the job． 再解释一次有好处。 It is good explaining it again. 跟你在一起工作是令人愉快的。 It is pleasant working with you．;③在there be no结构中 这种结构的意思相当于“It is impossible to do… ”。 这种事开不得玩笑。 There is no joking about such matter. 无法知道他什么时候离开。 There is no knowing when he will leave. ;归纳：常用V-ing形式作主语的句型有： It +be +a waste of time/money doing 做、、、是浪费时间/金钱的 It +be+ no good/use doing 做、、、是没好/用处的 It +be+ hardly/scarcely worth doing 做、、、不值得 It +be+ worth/worthwhile doing 做、、、是值得的 There +be+ no doing 无法、、、； 不允许、、、;There+ be+no sense in doing 做、、、没有道理 There +be+ no use doing 干、、、无意义 There +be+ nothing worse than doing 没有比、、、更糟的 There +be+no point doing 干、、、无意义 我们不知道要去哪儿。 There was no knowing where we would go. 做这件傻事毫无意义。 There is no point doing such a silly thing. ;注意：There is no need to do sth 干、、、没必要，在此句式中to do 不可换为doing.. 没有必要告诉她。 There is no need to tell her. 不用交家庭作业。 There is no need to hand in the homework. ;2. 作宾语: ① S. + vt.+ doing 避