不定式用法归纳全.pptVIP

不定式用法归纳全 第一页，课件共22页 一、作主语 （1）动词不定式作主语时，谓语动词用单数。 To do morning exercises is useful for our health. 做早操有利于我们的健康。 （2）如果动词不定式太长，常常用 it 作形式主语，而将真正的主语——动词不定式后置。 It took me half an hour to walk there． 第二页，课件共22页 二、作宾语 （1）能够接动词不定式作宾语的有（固定结构） agree to do beg to do(请求做…) decide to do determine to do fail to do hope to do manage to do(通过努力成功过了…) offer to do plan to do prepare to do pretend（假装) to do, promise to do refuse to do wish to do would like/love to do 但 finish, enjoy, miss, appreciate, mind, advise, suggest 等动词后面通常只能接动名词作宾语。例如： She enjoys reading very much．她非常喜欢读书。 The driver failed to see the other car in time. 司机没能及时看见另一辆车。 第三页，课件共22页 （2）动词不定式做宾语，可此宾语后还有宾语补足语的，通常要用 it 作形式宾语，而将真正的宾语——动词不定式后置。（前页中无宾补）例如： we think it important to obey the laws. √ we think to obey the laws important. × （3）不定式作介词宾语 当介词but、except、besides前面有行为动词do及其各种形式时，介词后面的不定式可以省略to，否则不省略。 What do（助动词不算） you like to do besides play football？ We have no choice but to wait. The boy has him own idea of how to finish it. 第四页，课件共22页 （1）能带宾语补足语动词有， （一感） feel sb do/doing （二听） listen to sb do/doing hear sb do/doing （三让） let sb do/doing make sb do/doing have sb do/doing （四看） look at，see，watch，notice 不带to的不定式作宾语补足语，强调动作的完成过程. (变成被动时，to要补上， 如： I heard her sing today=She was heard to sing today．(强调整个过程） I heard her singing at that time.（我听到她正在唱歌） 三、作宾语补足语（注：不是做宾语哟） 第五页，课件共22页 （2）能带宾补的动词还有 consider sth/sb to be（宾补）, expect sb to do, tell sb to do, want sb to do, warn sb not to do, wish sb to do， invite sb to do等。 区别 I have some work to do（定语，后讲）. （去掉不定式对句义影响不大） The manager get him to fini