2015职称英语考试已经渐渐拉开序幕, 小编整理了2015职称英语考试语法复习指导资料 ,希望对大家有较多的帮助,为2015年的职称英语考试打下良好的基础!
句子的连接、并列复合句、状语从句
状语从句
所谓状语从句,是指用来说明主句行为(或状态)发生的时间、原因、条件、地点、目的、结果及方式等。
1) 时间状语从句:记住以下连接词的意思和重点:
(1)when / while / as (当…时侯)
注意:while除了做时间状语的连接词外,还解释为"虽然…","而…".
例如:He is very diligent, while she is very lazy. (他很勤奋,而她却很懒。)
(2)before (after) 在…之前(后)
(3)until / not until(直到)注意:not until放在句首时,往往要求倒装(详见"第七讲")
(4)as soon as / once (一…就…)
(5)immediately / instantly / directly 原本是副词,这里作连接词,表示"一…就…",
例如: I knew I had made a mistake directly (或用immediately / as soon as) I had done it. (刚做完这件事,我就知道我做错了。)
(6)the moment / each time / every time / next time / the first time / the instant / the year原本是名词或副词,这里作连接词用。
(7)hardly (scarcely)…when… / no sooner…than…"一…就…"
注意:这是时间状语考试的重点句型,一是不要把两个句型中的when和than的搭配搞错了,二是要用倒装语序(详见"第七讲")。
例如:
Hardly had I sat down when the telephone rang. (我刚坐下,电话铃就响了。)
重点:在时间(和条件)状语中,用一般时代替将来时。
例如:
We'll start as soon as the leader ______. (领导一来就开始。)
A.comes B.is coming C.will come D.came
根据英语"时态一致性"原则,主句与从句的时态应一致,答案似乎应该是B或C,但是正确答案是A,因为在时间状语中,用一般时代替将来时。将上句改为过去时,道理也一样:
He said (that) we would start as soon as the leader _____.
A.came B.was coming C.would come D.comes
答案应为A
2) 条件状语从句:分真实条件句和非真实条件句(虚拟语气)
重点:在条件(时间)状语中,用一般时代替将来时(可参见时间状语从句例子)
虚拟语气(见"第六讲")
主要连接词:
(1)if / unless (除非 = if not 如果不)
例如:
Children should not be taken into the room of a very sick person ______ there is some special reason for it.
A.except B. besides C. unless D.whereas
解题思路:根据上面说过的连接原则,这里必须是一个"连接词",而A,B都是介词,因此正确答案只能在C,D中选。"whereas"意为"而",故正确答案为C.(不应把儿童带到重病人房间,除非有某种特殊原因。)
(2)provided / on condition that (跟句子) (如果…)知道这也是连接词就可以了,一般说,当考题中出现这种词时,应倾向选择。
3) 原因状语从句:
主要连接词:because/ since / as
要点:不要把连接词 because与介词短语because of ( + 名词或-ing形式) 相混淆;
不要把表示原因的since与表示时间的since"自从…"相混淆;
不要把表示原因的as与表示时间的as"随着…"相混淆;
顺便提一下, because表示直接"因果关系",而since, as 是对事实的说明,主句和从句之间并不一定具有"因果关系".
例如:
As you are already 18 years old, you should know what to do and what not to do. (你已经18岁了,应该知道什么该干什么不该干。)
这个句子用because连接就不太合适。好在军队职称考试中并不要求作这种分辨。
…for 注意:一般只能放在主句后面,即主句 + for从句,例如:
He must have gone to bed, for it is too late. (他肯定已经睡了;现在已经很晚了。)—— 该句不能用because
now that / seeing that / considering that (由于…)
Seeing that this problem was settled, they proceeded to the next one.(鉴于这个问题已经解决,他们开始进行下一个问题。) n
…in that(在于…)一般放在主句后面,例如:
Humans are superior to animals in that they can use languages as a tool to communicate. (人比动物高等,因为人能以语言作为工具进行交际。)