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发表于 2016-7-12 00:35:57
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【Composition】
She refused to answer any questions. She did not ask any questions. (not only…but…either)
She was not interested in the theatre. She was not interested in travel. (neither…nor)
She not only refused to answer question but she did not ask any question either.
=She not only refused to answer question but ask no question either.
but…as well 可以加肯定也可以加否定；but…either只能加否定,as well，either 在此句中可省略。
She was interested in neither the theatre nor travel.
=She was interested neither in the theatre nor in travel.(更好, 介词短语的并列)
【Key structures】
第 2类条件句（虚拟条件句）
第1类条件句，谈论将有可能发生的事情，并且考虑其将来的真实结果。主句用一般将来时，从句用一般现在时或其他形式的现在时。
If you help me,I will be gratefull. 如果你帮我, 我会感激你 (正常语气)
If it rains, I will not go. 正常语气(不一定会去)
第2类条件句，if 从句谈论想象的情况（假设与现在事实相反），主句则推测想象的结果。 从句使用一般过去时, 主句使用 would+动词原形。尽管第 2 类条件句使用过去时，却并非指过去的时间，所以，if之后的过去时用法常被称为“非真实的过去”，整个条件句也被称作非真实条件句。
If you helped me,I would be grateful.
如果你帮了我, 我会感激你(可惜你没有帮我, 我不会感激你)
If it rained,it would not be hot. 如果下雨, 就不会这么热
If you could make him change his mind, you would save him a lot of trouble.
假如你能使他改变主意, 你会使他免了许多麻烦.
如果if从句中的动词是be, 那么应该在第一和第三人称单数名词之后用were。If I were you这种说法经常用于提出建议。
If I were you, I'd accept their offer.
If I were in your position, I would act differently.
假如我处于你的位置, 我会采取不同的作法.
第2类条件句有时也可代替第 1类条件句来描述颇有可能发生的事情，但比第 1类条件句较为“无把握”。
If you went by train, you would get there earlier.
If you go by train, you will get there earlier.
第2类条件句经常用来描写完全不可能的事情。
If I had longer legs, I'd be able to run faster.
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