should在这个句子中是情态动词的用法,表示“应该”意思接近于ought to。作助动词时,should可用于第一人称,构成过去将来时态。在某些句子中,用should可以使口气显得更婉转,在某些宾语从句和主语从句里可以用来构成谓语,也用在虚拟条件句和条件从句中。在某些由in case, so that, lest等引导的状语从句中,也可以用should。
(1) I said I should be glad to help.
我说过我将乐于帮忙。
语法分析:should可用于第一人称,构成过去将来时态,在口语里大多用would。
(2) You should have been helping him.
你应该在帮助他。
语法分析:作情态动词用,后面可以用完成形式。
(3) I should be glad to talk to you.
我很高兴和你谈谈。
语法分析:用在某些句子里使语气更婉转,只用于第一人称。
(4) He determined that she should studymusic.
他决定她学习音乐。
语法分析:在某些宾语从句中构成谓语。
(5) It was necessary that he should workhard.
他用功很有必要。
语法分析:在某些主语从句里构成谓语。
(6) Should I be free thiss afternoon, Iwill come.
如果今天下午有时间,我就来。
语法分析:用在条件从句中,主句谓语可以用虚拟语气或陈述语气等。
(7) I should say she's over fifty.
我看她有五十多岁了。
语法分析:表示猜测。
<巩固练习>
(1) He considered how he ______answer.
(2) I _____ be grateful for your help.
(3) She arranged that I _____ go abroad.
(4) It is only right that he _____ have ashare.
(5) How _____ I know?
(6) If I was asked to work on Sunday I_____ resign.
(7) She was terrified lest she _____ slipon the icy rocks.
<参考答案>
(1) should (2) should (3)should (4) should (5) should (6) should (7) should
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