新課標英語高三上模塊十Unit 4 Learning Efficiently
had the captain been more careful, his ship would not have sunk?
should any visitors come, i would say you are not here.
4. if only 和 suppose (supposing), 也可以引導虛擬從句.
if only i had more time, i could go there to help them.
supposing it were fine tomorrow, would you go climbing the mountain with us?
5. if it were not / had not been for… 也是常見的虛擬句型，意思是“要不是…” 例如：
if it had not been for your help, we would not have achieved so much in our work.
if it were not for the wise decision, we could not be living a happy life.
6. 虛擬語氣用于i wish… 的賓語從句中：表示現在時間，動詞用一般過去時和過去進行時 (be動詞用were /was).表示過去時間，動詞用過去完成時和過去完成進行時.表示將來時間，動詞用 would/ could 等+動詞原形
i wish i knew how to operate this computer.
i wish he weren’t so lazy.
i do wish everything would be as quiet as before.
i wish we hadn’t been working overtime yesterday.
注意：這里i wish… 所表達的意思與 if only…差不多.以上的句子都可以用if only 來代替 i wish 例如：
if only i knew how to operate this computer.
if only we hadn’t been working overtime yesterday.
7. it’s (about/high) time +從句，表示“該做而未做的事”，是一種婉轉的建議，從句中的動詞用一般過去時 例如：
it is high time we began to work.
we’ve enjoyed the evening, but it’s time we went home.
it’s about time the boy learned to behave himself.
8. 表示“要求、建議、命令” 等動詞demand, require, suggest, insist, advise, order 等后接賓語從句時，從句謂語動詞一般用虛擬語氣，即should + 動詞原形（do/be done), should 也可以省略.例如：
he insisted that john (should) do the job.
we suggest that the meeting (should) not be postponed.
the union demanded that the wages (should) be raised by 20%.
常用的這類動詞是：ask (要求）, advise（建議）, command（命令）, decide（決定）, demand（要求）, insist（堅持）, move（提議）, order（命令）, propose（提出）, require（要求）, request（請求）, suggest（建議）, urge（主張）
如果這些動詞不是表示“要求、建議、命令”等意思時，這時賓語從句一般不用虛擬語氣。例如：
he insisted that i was wrong. (這兒 insist 意思是“堅持認為”）
the expression on her face suggests that she knows the secret. （這兒 suggest 意思是“表明”
step ⅴ consolidating and applying the rule
exercise to be shown on the ppt and one student at a time to do the exercise orally.
step ⅵ summary and assignment
1. make a summary of today’s task.