内容正文:
第四章 非谓语动词
Ⅰ.动词不定式
i.不定式作主语和表语
1.口语中常用it作形式主语。
2.若要说明不定式动作对于执行者的影响,常在不定式前加for sb.。
3.但是以形容词作表语来说明主语的行为品质时(如kind, good, nice, wise, clever, silly, wrong, right, foolish, stupid, careless, considerate, rude, naughty, polite, agreeable等),不定式前加of sb.。
4.不定式作表语,表示目的、结果、同意、命令、安排、决定、劝告等意义。
5.用it作形式主语,其真正的主语也可以是for+ there to be结构。
6.当主语和表语都是不定式时,其含义一-是条件,二是结果。
7.不定式作表语时,主语也常是what引导的名词性从句,表语说明其内容。
8.不定式作表语时,主语部分有行为动词do,不定式可省略to。
( )1.How the problem will be discussed some time later this afternoon.
A. to solve B. to be solve c. being solved D. solving
( ) 2. Is it necessary the geography book at once?
A. for her to return B. that she must return
C.her returning D. of him to return
( )3.It forty-five minutes there by bus.
A. costs; to get B. costs; getting
C.takes; to get D. takes; getting
( ) 4. This grammar point is later.
A. to explain B. to have been explained
C. to be explained D. to be explaining
( ) 5. Tom seemed the good news.
A. to learn B. to be learning
C. to have learned D. to have been learning
ii.不定式作宾语
1.只能以不定式作宾语,而不能以动名词作宾语的动词有:
(“希望"干)wish, hope, expect, long, desire;
(早“打算" )plan, mean, prepare, attempt, intend;
(“同意”“否")agree, consent, refuse, decline;
(“寻”“问"看)seek, ask, beg;
(“选"“定"了)choose, decide, determine, promise;
(“尽”“自愿" )manage, volunteer, tend;
(“称"“失败")claim, fail;
(“敢”“装蒜" )dare, pretend
2.可用于“动词十it+形容词/名词十to do sth."结构中的动词有feel, find, make, think,believe, consider 等。
3.动词不定式作宾语的形容词有happy, glad, pleased, sure, ready, anxious, eager, free,afraid, willing 等。
4.有些介词后也可以不定式作宾语,如介词but,except等,当介词前有行为动词do,不定式省去to。
5.“疑问词+不定式”常作下列动词的宾语: decide, find, forget, know, learn, remember,settle, consider, wonder 等,疑问词可以是what, where, who(m), when, how, whether,which等( why除外)。
6.有些双宾语及物动词也可以跟“疑问词+不定式”作直接宾语。
7.带疑问词的不定式通常也可以作介词的宾语。
专项练习
( ) 1. The flu is believed by viruses that like to reproduce in the cells inside the human nose and throat.
A. causing B. being caused
C. t