Unit 5 The power of nature
语法探究
1. V-ing作主语。常被看作是单数不可数名词。V-ing作主语, 有时用it 作形式主语,把V-ing置于句末. 这种用法在习惯句型中常用。.常用V-ing作主语的句型有:
It is /was a waste +v.---ing
It is /was no good /use +v.---ing
There is /was no sense in v.---ing (没道理)
There is /was no point in v.---ing (没意义)
It is a waste of time persuading such a person to join us 劝说这样的人加入真是浪费时间
2. 作宾语
某些动词后出现非限制性动词时只能用动名词作宾语,不能用不定式. 常见的此类动词有:advise , admit , appreciate, risk, forbid, pardon, quit, tolerate, allo w, permit, avoid, consider, enjoy, finish, imagine, include, keep, mind, miss, delay, practice, resist, suggest, feel like, object to, care for, com plain of, get/be accustomed to, fail in 等,如:
They went on walking and never stopped talking.他们继续走,说个不停。
3.v. ing 做定语
▲动名词放在所修饰的名词前面作为定语，表示该名词的用途或有关的动作。
walking stick 手杖 printing shop 印务馆 dining room饭厅
reading room 阅览室 swimming pool 游泳池 washing machine洗衣机
