虚拟语气可以粗略地分为两大类: 第一类: should 型虚拟式第二类:
were 型虚拟式 1. should 型虚拟式: should + 原形动词(往往省去 should , 特别是在考试时) 这类虚拟式最多用在以下词或句型中:
(1) it is necessary that 的主语从句中,如: it is necessary that the chief should be present personally at the meeting .(主任有必要亲自参加这次会议。
) 只要看到 necessary ,马上要想到这是 should 型虚拟式。 记住下面构成 should 型虚拟式的词: essential (必要的) /important (重要的) /necessary (必要的) /imperative (迫切的)/ impossible (不可能的)/ natural (自然的)/ preferable (更好的)/ advisable (合理的)/ desirable (理想的)/ urgent (紧迫的)/ incredible (难以想象的) (2) order (命令) /recommend (推荐)/ suggest (建议)/ demand (要求) /command (命令)/ propose (建议)/ require (要求)/ request (请求) /insist (坚持认为)/ urge (主张) /advise (劝告)/ ask (要求)/ prefer (宁愿)/ desire (愿望)/ move (提议)/ vote (提议) 由这些词构成的宾语从句,主语从句、表语从句、同位语从句或其他有关句型时,都要使用 should 型虚拟式,例如:
it was ordered that the medicines ( should ) be sent there by plane at once . 主语从句) the order was that the medicines ( should ) be sent there by plane at once .(表语从句) the chief ordered that the medicines ( should ) be sent there by plane at once .
(宾语从句) the order that the medicines ( should ) be sent there by plane at once was sent to the branch office .(同位语从句) (3) 在 in case / lest = for fear that (以免 / 以防) 结构中,例如: he took a raincoat with him in case it should rain (或用真实语气:
in case it rained ) she put a wool blanket over the child for fear that ( lest ) he should catch a cold . 她把一条毛毯盖在孩子身上,以防他感冒。) 可见,此类虚拟语气比较容易接受,考试时只要认准了上面的那些字一般就不难作出准确选择。
就解题而言,考生要注意:1) a 的位置往往安排干扰项,如使用 must , may , might , could 等类词进行干扰;2)句中往往省去 should , 直接用否定词 not + 原形动词的形式,以迷惑考生,例如: the housemaster (男舍监) was very strict .
he asked that we __television on week nights . a . must not watch b .
not watch c . should not h**e watched d . not be watching 该题中的 ask 意为要求,故是个 should 型虚拟式, 正确答案为 b .
4)在 it is surprising , disappointing , a pity , a shame , no wonder , simply a miracle + 从句的结构中,表示惊讶、高兴或遗憾,例如: it is surprising that she should look so miserable . 真是奇怪,她竟看上去如此不高兴。
) it is a great pity that you should miss such a good film . 你要是错过了这样好的电影那真是遗憾。) 2.
were 型虚拟式: 所谓 were 型虚拟式,就是借用行为动词过去时的某个形式以及 be 动词的 were 这个形式来表达某种虚拟的语气。 由于 were 型虚拟式主要用在 if 非真实条件句中,而且它是其他 were 型虚拟式句型的基础,所以我们先要搞清楚 if 非真实条件句。
(1) if 非真实条件句: 条件句分为真实条件句和非真实条件句: 真实条件句是指真实的或可以实现的条件句,例如:
if we work together , we are sure to finish the task in time . 如果我们大家一起努力,就一定能按时完成任务), 动词使用的是真实的时态和形式。 非真实条件句是指对已经发生过的事情,或对不可能发生或实现的事进行假设,例如:
如果当时有医生在,这个孩子就有可能得救了,显然,这是对已发生的事情的一种假设,该句的英语表达为: if there had been a doctor **ailable , the child might h**e been s**ed . 为了便于理解和记忆,我们用**形式加以归纳:
时间动词形式举例过去 if 条件句: had done / had been 结果句: would h**e done / beenif there had been a doctor **ailable , the child might h**e been s**ed .
倒装: had there been a doctor **ailable , the child might h**e been s**ed 现在 if 条件句: did / be 动词用 were 结果句:
would do ( be ) if i were you , i would accept his offer . 如果我是你的话,我就接受他的提议。) 倒装:
were i you , i would accept his offer . if i knew the fact , i would tell you . 我要是知道,我就会告诉你) 不可以倒装将来 if 条件句:
should do ( be ) were to 结果句: would do ( be ) if it should rain tomorrow , we would stay at home . 一旦明天下雨,我们就呆在家里。
) 倒装: should it rain tomorrow , we would stay at home . if he were to come this evening , i would ask him to help solve the problem .
要是他晚上会来,我就请他帮助解决这个问题。) 倒装: were he to come this evening , i would ask him to help solve the problem .
这里关键是要掌握好两点: (a ) 虚拟行为或状态发生的时间:过去?
现在?还是将来? (b ) 采用了什么相应的动词形式?
补充说明: (a ) 当 if 省略后,要采用倒装形式,如举例所示; (b ) 如果所说的条件是永远不可逆转的。如如果我是你的话(我永远不可能变为你),即使是对过去的假设,也用现在虚拟式表示,例如:
if i were you , i would h**e taken his advice . 要是换了我,我就采纳他的意见了。) c ) 结果句中的 would 可以根据内容需要,使用 might , could 或 should ,例如:
if she had known that you were there , she might h**e come .(要是她知道你在哪儿,她或许会来的。)但是将来虚拟式条件句中的 should 是将来时的标志词,不能用 would 代替,不要搞错了。
(d ) 关于含蓄虚拟式:含蓄虚拟式是指虚拟的条件用一种比较含蓄的方式加以表达的虚拟语气,如:我昨天很忙,要不就来参加你的生日派对了。
其中的我很忙是真实情况,要不就来参加你的生日派对了则是虚拟的: i was very busy yesterday , or i would h**e come to your birthday party . 所以,注意句子**现的:
but , or (否则), otherwise (否则), without (要不是), with (要是有), but that (要不是), but for (要不是), if it were not for / 过去: if it had not been for (要不是 ) 等用来引出含蓄虚拟式的词或短语,例如: but for (或 without ) your cooperation , we would not h**e completed the experiment so smoothly .
(要不是你们的合作,我们不可能那样顺利地完成这个实验。) 2) were 型虚拟式的其他用法 (同样要遵守过去、现在、将来的虚拟规则): wish 宾语从句:
i wish that he had not made so much fuss about it .(真希望他不要把那事搞大了。- 过去) i wish that i were a doctor .
我希望我是个医生就好了。- 现在) (注:这个句型中也可以用 i wish that i was a doctor .
)i wish that the rain would stop . 真希望雨能停下来。将来) if only (要是就好了) if only you hadnt offended him .
你当时不惹他就好了。- 过去) if only i had some money on hand now . 我现在手头有些钱就好了。
-现在) if only he could come tomorrow . 他明天能来有多好啊。-将来) it is ( about / high ) time that .
(是的时候了) 由于该句型只能用在现在时间,所以从句的动词只能是过去时形式,例如: it is high time ( that ) we began to work . 咱们该开始工作了。
) as if ( though )(似乎) 这个句型可以是陈述语气,也可以是虚拟语气。虚拟语气的时态变化原则与 wish 用法相同,例如: she loves the children in the kindergarten as if they were her own .
她象自己孩子一样热爱幼儿园的孩子门。 -现在) he talked about china as if he had been there . 他谈起中国来好象去过那里。
) it looks as if it is going to rain .(看来天要下雨。- 陈述语气) would ( had ) rather , would just as soon , would sooner , would prefer + 从句结构这几个句型都表示一种婉转的责备,中文常有还不如,宁可倒希望等意思,例如:
id rather she stayed at home in such a bad health condition . 她身体这么差,我倒希望你呆在家里。- 现在) i would just as soon you had returned him the money yesterday .
你还不如昨天就把钱还给他了。- 过去) i would prefer he didnt stay there too long . 我倒不希望他不要在那儿呆得时间太长。
) 比较: i would prefer that she act the young lady . 我倒认为她演哪个年轻女子比较合适。
- 表示建议,用 should 型虚拟式) 做虚拟语气的题目,归纳起来就是两句话: 一是,看清是什么形式的虚拟式, should 型还是 were 型? 二是,如果是 were 型虚拟式,看清句中所给的时态:
过去、现在、将来? 这里的关键是:要对构成虚拟语气的词、词组和句型比较敏感。
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