英语语法 虚拟语气:非真实条件句.should 是什么?第一个should + have + doneYou should have seen his face.(原句)这句是省略了从句,没错吧.If the steamer should have left port at noon,it will be passing through the canal now.(原句)不应该是:If the steamer had left port at noon,it would have been passing through the canal.或者:If the steamer left port at noon,it will be passing through the canal now.请指教上两句对吗?原句中的should have 那么最上头那句也不理解了.第二个 should + beIf you should see Celia,give her my best wishes.(原

问题描述:

英语语法 虚拟语气:非真实条件句.should 是什么?
第一个should + have + done
You should have seen his face.(原句)这句是省略了从句,没错吧.
If the steamer should have left port at noon,it will be passing through the canal now.(原句)
不应该是:If the steamer had left port at noon,it would have been passing through the canal.
或者:If the steamer left port at noon,it will be passing through the canal now.
请指教上两句对吗?原句中的should have 那么最上头那句也不理解了.
第二个 should + be
If you should see Celia,give her my best wishes.(原句)
不应该是:If you saw Celia,give her my best wishes.
第三个 作表语
They suggested that we should meet at the station.(原句)请问有点像had better的感觉,没有时间的概念,也是非真实条件句吗?
suggest有这个短语呀 那么这样呢
It is desirable that everything should be ready by five o'clock.(原句)

第一和第二个问题中的should都是翻译成“万一”,不是虚拟。
suggest句中的should是虚拟。这个是固定用法。表示建议,命令,还有那些还没实现的词引导的从句,不管是宾从还是表从还是主从中都用这种should型的虚拟,最后的补充问题也属于这一类。不但有desirable,还有surprising。

should have done:本应该做,而没有做的事
should 表一种可能,意愿,如果是saw,不是变成过去时了吗?与意不符啊
suggest 表建议,要求时,有一种就是suggest...(should) do sth.

一:If the steamer should have left port at noon,it will be passing through the canal now.这句是混合虚拟~前面半句是对过去的虚拟~后面半句是对现在的虚拟~其中now就是现在的标志~
二:should表虚拟~
三:should也表虚拟~
四:desirable也是虚拟的标志语~It is desirable that 后面就要用虚拟~这类词还有很多necessary,essential之类~语法书上有的~把他们记住就行了~

should have done 的意思是,应该做而事实上没有做的事情。但在口语中,有时只是表示一种加强的语气。像最上面一句有可能是这种情况:你真应该看看他的脸(表情),他气坏了(沮丧极了、、)
第一句,原句表达一种抱怨的语气。而你修改的都没有这么强烈
第二句你改的也不对。should 这里表达一种不太能的语气,有的时候有“竟然”的意思。这里就是表达“万一你看到她,代我向她问好”之意。
即使你改,if后面也应该是一般现在时态 if you see Celia..
第三句,这是suggest的特殊用法。这里suggest 直接加should do sth.其中should 可以省略,即 suggest + (should )do sth.注意这里suggest 是建议的意思。suggest 另外还有暗示的意思,这时不需要用虚拟语气。
勤学好问的孩子,加油啊。