三、智能显示
【心中有数】
单元语法发散思维
一、不定式正误例析
1 . 误：The patient was warned to eat not oil food after the operation .
正：The patient was warned not to eat oil food after the operation .
析：不定式的否定式应在 to do 前加 not .
2 . 误：We agreed to have met here but so far she hasn\'t turned up yet .
正：We agreed to meet here but so far she hasn\'t turned up yet .
析：不定式的完成式表示动作已发生，由句意看出\"她还未露面\"，所以应该用一般式。
3 . 误：Paul doesn\'t have to be made learn . He always works hard .
正：Paul doesn\'t have to be made to learn . He all ways works hard .
析：动词 feel , listen to , hear , have , make , let , see , watch , notice , look at , observe , 接不定式作宾补应省略 to，但在被动语态中应加上。
4 . 误：The boy wanted to ride his bicycle in the street , but his mother told him not to do .
正：The boy wanted to ride his bicycle in the street , but his mother told him not to .
析：在不定式作宾补或含有不定式的简单答语中，为避免重复，可省去其后的动词原形，但动词不定式符号不可省，又如 would like to , used to , be going to 等。
5 . 误：Rather than to ride on a crowded bus , he always prefers riding a bicycle .
正：Rather than ride on a crowded bus , he always prefers to ride a bicycle .
析：prefer 的用法如下：
prefer to do A rather than do B
prefer doing A to doing B
6 . 误：Tom ought not to tell me your secret , but he meant no harm .
正：Tom ought not to have told me your secret , but he meant no harm .
析：ought to / should + have done sth . 表示本来应该做某事，而实际未做；ought not to / shouldn\'t + have done sth . 表示本来不应该做某事，而实际做了。
7 . 误：Oh , it\'s very cold here , let\'s make a fire warm ourselves up .
正：Oh , it\'s very cold here , let\'s make a fire to warm ourselves up .
析：此处不定式短语作目的状语，相当于 in order to do或so as to do。
8 . 误：As I got to Paris , she was beginning studying French in a language school .
正：As I got to Paris , she was beginning to study French in a language school .
析：begin 和 start 之后既可以接不定式作宾语，也可以接动名词作宾语，但以下三种情况只能接不定式作宾语 . 1 ) 物作主语；2 ) 本身是进行时态；3 ) 其后接的是表示心理变化的动词。
9 . 误：— I\'d like to buy an expensive sports car .
— Well , Mike , we\'ve got several models to choose from .
正：-I\'d like to buy an expensive sports car .
-Well , Mike , we\'ve got several models to choose .
析：不定式短语作后置定语，并且与其所修饰的词构成逻辑上的动宾关系，不定式短语中的动词必须是及物动词或相当于及物动词的短语。但此处 choose 本身是及物动词，故不需 from。
10 . 误：Making a plan first is a good idea .
正：To make a plan first is a good idea .
析：动名词表示经常性，习惯性的动作；而不定式表示具体的一次性动作。
11 . 误：Why to stay here so long ?
正：Why stay here so long ?
析：why + 不带 to 的动词不定式构成的问句表示\"责备\"或\"不同意\"。
12 . 误：He refused answering any question .
正：He refused to answer any question .