二：虛擬三：虛擬語氣
情態(tài)動詞所表達的可能性程度：must/can't à should/shouldn't à might/may (not)
另外兩個"類情態(tài)詞的形式："need/needn't; have to/don't have to
v 最自然的虛擬狀態(tài)：由should/would+原型時態(tài)（不含時間只含狀態(tài)）
本質(zhì)上是過去將來時：即，時間固定在過去將來，狀態(tài)不同：一般、進行、完成、完成進行。
這時"虛擬語氣"的產(chǎn)生往往是因為我們要表達"本來應(yīng)該……"（而現(xiàn)在卻還沒有……）
（本來可以……，本來能……）
I should go! (… but I'm still here!) (一般)
I should be working now! (進行)
I should have practiced more (than I did)! (完成)
我應(yīng)該多多練習(xí)?。ㄑ韵轮?，現(xiàn)在我練習(xí)得不多。）
I shouldn't dream away my time too much! (完成的否定)
(actually I did dream away my time too much!)
It shouldn't have been leaking for such a long time! (完成進行)
I may/might/could have finished! (完成)
一些常見的句型中，就會出現(xiàn)這種虛擬語氣，而處于從句之中，should 常常被省略掉
o suggest, advise, propose, recommend, plan;
o demand, order, direct, arrange, command, decide;
o require, request;
o think, expect, believe, insist, suspect.
由于他們的含義中包含"建議，假設(shè)，應(yīng)該"這類的含義，所以，由他們引起的從句中，就會包含有should+原型時態(tài)構(gòu)成的虛擬語氣。
這些動詞（以及他們的名次考(試大形式，分詞形式）引起的從句還有其他的變形：
主語從句，表語從句，同位語從句
It's suggested that…
My suggestion is that…
The only suggestion that...
The only suggestion I can give you now is that…
一些形容詞引起的表語從句中，也會有同樣的情況
important; necessary; essential
It's natural ; strange; incredible that
a pity; a shame; no wonder
Ø 由lest, for fear that, in case 引起的從句中多使用should
v 表達與事實相反
1. 與現(xiàn)在相反：使用[過去時]：
I wish I were not here! (一般現(xiàn)在à一般過去)
Suppose we were not here.
He loved me as if I were his own son. (一般現(xiàn)在à一般過去)
Hope I weren't always losing things! (現(xiàn)在進行à過去進行)
情態(tài)動詞所表達的可能性程度：must/can't à should/shouldn't à might/may (not)
另外兩個"類情態(tài)詞的形式："need/needn't; have to/don't have to
v 最自然的虛擬狀態(tài)：由should/would+原型時態(tài)（不含時間只含狀態(tài)）
本質(zhì)上是過去將來時：即，時間固定在過去將來，狀態(tài)不同：一般、進行、完成、完成進行。
這時"虛擬語氣"的產(chǎn)生往往是因為我們要表達"本來應(yīng)該……"（而現(xiàn)在卻還沒有……）
（本來可以……，本來能……）
I should go! (… but I'm still here!) (一般)
I should be working now! (進行)
I should have practiced more (than I did)! (完成)
我應(yīng)該多多練習(xí)?。ㄑ韵轮?，現(xiàn)在我練習(xí)得不多。）
I shouldn't dream away my time too much! (完成的否定)
(actually I did dream away my time too much!)
It shouldn't have been leaking for such a long time! (完成進行)
I may/might/could have finished! (完成)
一些常見的句型中，就會出現(xiàn)這種虛擬語氣，而處于從句之中，should 常常被省略掉
o suggest, advise, propose, recommend, plan;
o demand, order, direct, arrange, command, decide;
o require, request;
o think, expect, believe, insist, suspect.
由于他們的含義中包含"建議，假設(shè)，應(yīng)該"這類的含義，所以，由他們引起的從句中，就會包含有should+原型時態(tài)構(gòu)成的虛擬語氣。
這些動詞（以及他們的名次考(試大形式，分詞形式）引起的從句還有其他的變形：
主語從句，表語從句，同位語從句
It's suggested that…
My suggestion is that…
The only suggestion that...
The only suggestion I can give you now is that…
一些形容詞引起的表語從句中，也會有同樣的情況
important; necessary; essential
It's natural ; strange; incredible that
a pity; a shame; no wonder
Ø 由lest, for fear that, in case 引起的從句中多使用should
v 表達與事實相反
1. 與現(xiàn)在相反：使用[過去時]：
I wish I were not here! (一般現(xiàn)在à一般過去)
Suppose we were not here.
He loved me as if I were his own son. (一般現(xiàn)在à一般過去)
Hope I weren't always losing things! (現(xiàn)在進行à過去進行)