2.在It's surprising/ strange/ a pity...以及I'm surprised/ sorry...等句型中,當(dāng)"竟然會(huì)"講.例如：
①It's surprising that you should be so foolish.真令人吃驚,你竟會(huì)如此愚蠢!(現(xiàn)在)
②It's surprising that you should have failed to pass such an exam.真令人吃驚,這樣的考試你竟然不及格.(已發(fā)生)
3.單獨(dú)用"should (not) +have+過(guò)去分詞"形式,對(duì)已發(fā)生的事表示遺憾或責(zé)備,表達(dá)"本該或不該"之意.例如：
①He also learns that he should have cared more about his friends.他還明白了他本應(yīng)該多關(guān)心朋友.(高一課本上冊(cè)P4)
②He shouldn't have let out the secret.他本不該泄露秘密的.(實(shí)際情況是"他已泄密".)
二、用于揣測(cè),表示可能或期望,意思是"照理說(shuō)來(lái)、應(yīng)該".
在語(yǔ)氣上should比must弱,但比may/ might強(qiáng)；shouldn't比
can't弱,但強(qiáng)于may/ might not.例如：
①I should be home in about ten minutes.照理說(shuō)來(lái),約十分鐘后我就能到家.(高一課本上冊(cè)P59)
②He should be having class now.他現(xiàn)在應(yīng)該是在上課.
③As far as I know you shouldn't have any problems there.就我所知,在那里你不會(huì)遇到任何問題.
④According to the schedule,they should have arrived in Shanghai by now/ yesterday.按照計(jì)劃,他們現(xiàn)在/昨天應(yīng)該已經(jīng)到達(dá)上海了吧.
(注：本句中的"should+have done"結(jié)構(gòu)并不表示責(zé)備,僅表示說(shuō)話人的揣測(cè).)