动词不定式 复习课件-河北省鸡泽县第一中学高三英语语法复习(共28张PPT)

动词不定式 1．动词不定式的句法功能 (1)不定式作主语 To know something about English is one thing；to know English is quite another. 此时，常用it作形式主语，而把不定式放在句子的后部。 It isn’t easy for her to find a new job. (2)不定式作宾语 ①不定式可作某些动词的宾语，常见的动词有：afford， agree，ask，decide，desire，expect，fail，hope，manage， promise，pretend，plan，intend，refuse，wish等。 I promised not to be late. ②介词but/except后接不定式作宾语时，如前面有实义动词do， 不定式就要省略to。 It has no choice but to lie down and sleep. They did nothing but complain. (3)不定式作宾语补足语 ①某些动词如tell，want，wish，advise，order，require，expect， remind，persuade，encourage，convince，force，beg，allow， forbid等后可接不定式作宾语补足语。 My doctor advised me to take a rest. ②某些感官动词如feel，hear，see，watch，notice，observe等或使 役动词如have，let，make等后面可接不带to的不定式作宾语补足语。 但如果句子变成被动语态时，就必须带to 符号。 Did you notice anyone go into the house? Was anyone noticed to go into the house? ③某些动词如find,feel,think,expect,consider,make等后可接不定式作宾语， 但宾语后要接形容词或名词作宾语补足语，而且要用it作形式宾语。 News services make it possible for newspapers to give their readers news from around the world