OG回顾要点:
【1】since:表原因时候,没有because好,OG解释使用since会使得句子失去重要的因果联系;
【2】无论是被动语态还是定语从句,有确定的动作发出者的时候一般都用主动的形式;
【3】begin to do和begin doing的区别在OG12中并未作为splits;
【4】maybe 和perhaps可以互换,后者更加正式一点;
【5】If is used to express conditional statements. If & When are interchangeable when the conditional if statement expresses facts or definite events;
【6】 关于but,although,even though等; But:并列连词,和as,yet属于一类;这类词语要求两边对称; Even though:后必须接句子; Although:后面可接形容词或者形容词性的短语: James, althoughbigger than many of the other players, is one of the fastest men on theteam. 【7】Expectation that之后的从句动词用虚拟语气 【8】"according to..." doesn't make sense in this context. that's a phrase you use when you name the person or source from which some information/opinion/etc. comes. according to GMAC, the GMAT exam is designed to measure test-takers' reasoning abilities, not their knowledge of particular content.
【9】attempt to try, wordy;
【10】v-ing作为modifier,有两种,一种是noun modifier,一种是adverbial modifier,前者遵从touch rule(一般说来noun modifier都遵从touch rule);
如果v-ing放在句首,那么就必然是作为noun modifier,修饰——主语;如果v-ing为于句子“内部”,前面没逗号,那肯定是noun modifier,修饰preceding noun;
【11】to do总是表示某一次具体的应用或目的,表达功能的话用doing更为合适。
【12】句尾的"comma + infinitive"是adverbial modifier。而我们知道adverbial modifier的位置可以很灵活,通常可以放前面、后面甚至中间。 To get a high score, we study hard.
We study hard to get a high score.
但如果这个句子复杂点,怎么办?To get a high score, we do a lot of practices and analyze the questions.
We do a lot of practices and analyze the questions, to get a high score.
这个时候,注意第2句话,"to get a high score"前面就有个逗号。
你来试试不加逗号啥效果:
We do a lot of practices and analyze the questions to get a high score.
什么叫做"questions to get a high score"? 很多名词后面都可以加infinitive来修饰,比如"attempt to do it" "courage to take on the challenge".....那我能否把这"questions to get a high score"当作一个整体,搅尽脑汁去理解呢?
相信你明白我的意思了。我想说的是,如果我们把"to get a high score"放到句子末尾,就要加逗号,以方便读者的理解,照顾一下我可怜的脑细胞。这就是说为什么GMAT强调的是effective expression.
“但是commma+不定式不是错的么”
我想说,从来就没有这个规则!"comma + infinitive"作adverbial modifier 在英语里很普遍,比如就我上面那个句子:
We do a lot of practices and analyze the questions, to get a high score.
第30题,我觉得是说,这里"to protect"不能作为adverbial modifier,因此就不能用刚才说到的"comma + infinitive"这个adverbial modifier的结构。
为什么不能作adverbial modifier? 因为adverbial modifier是修饰的整个sentence/clause的意思.
这个句子主干:
Shields were essential items of military equipment.
所以"to protect"和这个句子不搭调。
如果你非要用逗号后面加"to protect",那我造这个句子:
Members of Ashanti nation developed shields as essential items of military equipment, to protect ....
你看,这个句子的主干,是:
Members developed shields.
Question: why did they develop shields? Answer: To protect ....
Because "to protect ..." answers the "why" question, it is regarded as an adverbial modifier.
判断能否作为adverbial modifier,有个简单的办法,就是像我上面那样提问,看能否answer the how/why/where/when questions.
当你这么检验的时候,你就会发现
"to protect" CANNOT answer the how/why/where/when questions for "Shields were essential items of military equipment".
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