状语从句种类从属连词例句说明so that和if/unless

状语从句种类从属连词例句说明so that和if/unless
so that/so…that
We turned up the radio, so that everyone heard the news.
我们把收音机的音量放大，大家都听到了新闻。
He was so excited that he couldn’t say a word.
他十分激动，以致一句话都说不出来。 so that前有逗号为结果状语从句
so…that的so后面跟形容词或副词
such…that He gave such important reasons that he was excused.
他说出了这么重要的理由，得到大家的谅解。
It is such an interesting novel that all of us want to read it.
It is so interesting a novel that all of us want to read it.
这是一本十分有趣的书，大家都想看。 such…that的such后面跟名词，如果名词是单数就要用such a /an…that还可以转换用so…that，语气较强
高中英语单词表3500词必背
 英语单词记忆法
 高中英语课本

if/unless
as/so long as
in case
so far as
once Difficulties are nothing if we are not afraid of them.
如果我们不怕困难，困难就算不了什么了。
We shall go there tomorrow unless it rains.除非下雨，我们明天就去那里。
= We shall go there tomorrow if it doesn’t rain.
So/As long as you work hard, you will succeed.
只要你努力工作，你就一定能成功。
In case I forget, please remind me about it .万一我忘了，请提醒我一下。
So far as I know, the book will be published next month.
据我所知，那本书下月出版。 unless从句的谓语只能用肯定式。unless和if…not同义，unless是书面语，if…not是口语，通常二者可以换用
条件状语从句中的谓语动词的时态一般要用现在时或过去时代替一般将来时或过去将来时

suppose/supposing (that)假定
provided/providing (that) ;
on condition (that) 在……条件下，以……为条件 Suppose/Supposing it rains tomorrow, what shall we do? 假如明天下雨，我们该怎么办？
I’ll go provided/providing the children can come with me.要是孩子们能跟我一起去，我就去。
I’ll allow you to go swimming on condition that you don’t go too far from the bank.我将允许你去游泳，条件是你不能游的离岸边太远。

(1) It was when she was about to go to bed _________ the telephone rang.
A. since B. as C. that D. then
答案选C，被强调成分为 when she was about to go to bed 这一时间状语从句。，被强调成分为

(2) It may have been at Christmas _________ John gave Mary a handbag.
A. before B. who C. that D. when
答案选C，被强调成分为 at Christmas，其中的动词 be 采用了 may have been 这一较为复杂的形式。

(3) Who was it _________ saved the drowning girl?
A. since B. as C. that D. he
答案选C，被强调成分为 who，该句实为 It was Tom that saved the drowning girl. 这一强调句的特殊疑问句形式(即对其中的Tom 提问而得)。

(4) What is it _________ his daughter needs most?
A. what B. which C. that D. if
答案选C，被强调成分为 what，该句实为 It is a bike that his daughter needs most. 这一强调句的特殊疑问句形式(即对其中的bike 提问而得)。

(5) It was not until he came back _________ he knew the police were looking for him.
A. which B. since C. that D. before
答案选C，为 He didn’t know the police were looking for him until he came back. 之强调句式。注：not…until…的强调句式通常为 It was not until…that… 的形式。