it 句型大扫描(下)
英语是AEAS考试培训中至关重要的课程，2016AEAS考试报名时大家关注较多的就是英语方面。为了更好的提高广大考试的AEAS真题模拟成绩，下面澳大利亚中学入学考试网带领大家一起学习it 句型大扫描(下)。
11. It is ... when ...
该句型中的 when 引导的是一个时间状语从句，主句中的 it 指时间，表语由具体的时间充当。常译为"当...的时候，是..."。
It was 5 o’clock when he came here.
12. It be ... before ...
该句型主句中的 it 指时间, 主句中的时态常是将来一般时或过去时两种时态.主句中的表语多是long, not long , 3 days , 2 weeks 等表示时间段的词或短语。常译为"...之后..."。
It was 3 days before he went to Beijing.
It will be not long before he finishes his job.
13. It happens (seems, looks, appears ) that...
该句型中it是形式主语，that 引导的是主语从句，主句中的happen , seem等词是不及物动词.
It happened ( so happened ) that he met his teacher in the street. 碰巧..
It seems that he will be back in a few days. 看来...
14. It takes sb. ... to do sth.
该句型中的不定式是真正的主语，it是形式主语，句型中的直接宾语是时间。常译为"做...要花费某人..."。
It took thousands of people many years to build the Great Wall.
15. It is no good (use ) doing sth.
该句型中的真正主语是动名词短语，主句中的表语可以是no good , ( not any good ) , no use , ( not any use )。
It is no good learning English without speaking English.
16. It doesn’t matter whether ( if ) ...
该句型中whether(if) 引导的从句是真正主语，该句型常译为 "不论(是否)...没关系...。
It doesn’t matter if they are old.
17. It is kind ( of sb. ) to do sth.
该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由 of引起，主句中的形容词必须是能表示逻辑主语特征的形容词。常见的有： bad , brave , careless, clever , cruel , foolish , good (好心的), honest , horrible , kind , lazy , modest , naughty , nice(有教养的), polite, rude , silly , stupid , wise , wrong(错误的)等。 这个句型可以改写为：sb. is kind to do sth.
It is kind of you to say so.
= You are kind to say so.
18. It is necessary ( for sb. ) to do sth.
该句型与上一个同属一个句型。如果不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词。常见的形容词有：① important, necessary, natural ② easy , safe , common , normal , hard , difficult , dangerous , unusual, rare , impossible , pleasant等。
在①中的形容词作表语可以用从句改写， 如：
It is important for her to come to the party.
= It is important that she (should ) come to the party
19. It looks ( seems ) as if ...
该句型中it无意义。 as if 引导一个状语从句。常译为，"看起来好象..."如果与事实不相符合，则用虚拟语气.
It looks as if he is ill.(真的病了)
It looks as if he were ill. (没有生病)
It seemed as if he were dying.
20. We think it important to learn a foreign language.
该句型中的it 作形式宾语。为了记忆方便我们可称该句型为"6123结构"。
6指主句中常用的动词：think, believe, make, find, consider, feel;
1指的是形式宾语it;
2指的是宾补的两种形式：形容词或名词;
3指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。
We think it our duty to clean our classroom every day.
He felt it important learning English well.
They found it difficult that they would finish their work in two days.
以上就是澳大利亚中学入学考试网关于it 句型大扫描(下)的全部内容，AEAS考试难度还是比较大因此建议同学们做足准备准备工作提高英语能力，制定科学合理的备考策略，循序渐进的提高英语实力！更多AEAS备考资料请持续关注澳大利亚中学入学考试网。
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