should的用法( 二 )


我不明白为什么他居然不愉快 。
六、should 作为情态动词,可以用来表示有较大可能实现的猜测、推论,通常译为“可能”、“总该……吧”,相当于 be expected to 。例如:
They should be home by now,I think.
我想现在他们总该到家了吧 。
The report was written after a careful investigation,so it should be reliable.
这份报告是经过周密调查后才写成的,所以应该是可靠的 。
七、should 作为情态动词,用在由 so that, for fear that, lest 引导的目的状语从句和 in case (that) 引导的条件状语从句中,有“能够”、“可能”、“会”之意 。例如:
They got up early so that they should (= could/ might) catch the first bus in time.
他们起得很早以便能及时赶上头班公交车 。
He is working hared for fear that he should fall behind others.
他努力工作,唯恐落在别人后面 。
We went over the document again and again lest we should miss any of the main points.
我们把文件看了一遍又一遍,唯恐忽略了其中的什么要点 。
He took an umbrella in case (that) it should rain.
他带了一把雨伞,以防天下雨 。
八、should 作为情态动词,可以用于下列虚拟语气句中:
1. 用在表示与将来事实相反的条件状语从句中,构成“If …… should (do sth.)……,…… would/ could/ might (do sth..)……”句式 。例如:
If it should (或 were to ) rain tomorrow, the sports meeting would be put off. (= Should it rain tomorrow/ Were it to rain tomorrow, the sports meeting would be put off.)
如果明天天下雨,运动会就会延期举行 。
2. 用在suggest(propose),arrange,plan,decide,advise,order,demand,request,desire,insist等表示“建议”、“要求”、“命令”、“决定”、“安排”、“计划”、“主张”的动词后面接的宾语从句中 。这里的should 也可以省略 。例如:
He suggested/ proposed/ demanded/ advised that they (should) read the rules carefully.
他建议 / 提议 / 要求 / 劝告他们要仔细阅读这些规则 。
The doctor ordered that she (should) stay in bed for another week.
医生嘱咐她再卧床休息一个星期 。
He insisted that we (should )take up the matter at the meeting.
他坚持要我们在会上提出这个问题 。
3. 用在“It is desired/ suggested/ requested/ ordered/ proposed/ decided”之后由that引导的主语从句中,should也可以省略 。例如:
It is requested that Miss Yang (should) give a performance at the party.
人们要求杨小姐在聚会上表演一个节目 。
It has been arranged (planned) that they (should) leave the following week.
已经安排(计划)让他们下星期动身 。
It has been decided that the meeting (should) be postponed till next Saturday.

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