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2016英语六级常考句型精讲
想要考好英语六级怎么能不知道这些常考句型呢?下面就让小编为大家详解一下吧。
一、only引导的词组或句子放在句首作状语时，通常要用倒装结构。如
Only in this way can you solve the problem.
只有通过这种方式你才能解决问题。
Only if you study hard can you pass the exam.
只有努力学习才能通过考试。
Only then did I realize my mistake.
只有那时我才意识到错了。
二、not only...(but also)出现在句首时，如果架连接的是两个句子，常用倒装。如
Not only did we lose all our money,but we also came close to losing our lives.
我们不仅丢了钱，还差点把命丢了。
Not only did he speak correctly,but he also spoke easily.
他不仅说得准确，而且说得很轻松。
三、only放在不定式前面，常表示不愉快或出乎人们的意料的结果。如
I went all the way to his home only to find hime out at a meeting.
我径直到他家里去，不料发现他出去开会了。
I hurried to the post office only to find it closed.
我匆忙赶到邮局，不料已经关门了。
She went home only to find her house burglarized.
她回到家里，发现房子被盗了。
四、“too...to...”结构中，表示否定意思，但在“only too...to...”结构中，only too = very，表示肯定意思。如
The patient is too weak to walk.
那个病人太虚弱了，走不动。
We are only too willing to do it for you.
我们非常愿意为你做那事。
I am only too delighted to accept your king invitation.
我非常高兴地接受你的邀请。
五、在“one of + 复数名词 + 定语从句”的结构中，定语从句一般被看作修饰复数名词，谓语要用复数形式。但在“the only one of + 复数名词 + 定语从句”的结构中，定语从句却被看作修饰“the only one”，谓语动词要用单数形式。如
This is one of the best novels that have been published in the past two years.
这是近两年出版的最好的小说之一。
He was the only one of the boys who was given a prize.
他是这些孩子中唯一受到奖励的。
She is the only one of the girls who has been to the US.
她是那些女孩中唯一去过美国的。
六、If only 为虚拟语气的一种，表示愿望或一个未实现的条件，多用于感叹句，其主句常常省略。如
If only she would marry me!
她要是能和我结婚该多好!
If only he had known about it!
他那时要是知道这件事该多好!
If only you could have been here earlier that day!
要是你那天再早点到这就好了。
If only there were forty-eighty hours in a day.
要是一天有48个小时就好了。
延伸阅读：
1.指人的关系代词：who, whom, whose, that 的用法：
(1)作主语(who, that )
Those who are going to play in the match are to meet at the gate at 1:30 after lunch. 那些参加比赛的人午饭后1：30在大门口集合。
在本句中，先行词是those;关系代词who引导定语从句，同时代替先行词在从句中担任动词are going to play 的主语。
The man who/that is talking with Mr. Wang is a famous doctor. 正在和王先生说话的那个人是一个有名的医生。
在本句中，先行词是the man;关系代词who/that引导定语从句，同时代替先行词在从句中担任动词is talking的主语。
这个复合句可以还原成两个句子：The man is a famous doctor. He is talking with Mr. Wang.
(2)作宾语包括作介词宾语(whom, that )。此种情况下的关系代词可以省略;
This is just the man(whom/that) I want for the job.这正是我要的做这份工作的人。
在本句中，先行词是the man;关系代词whom/that 引导定语从句，同时代替先行词在从句中担任动词want 的宾语。
(3)当关系代词紧跟介词作介词宾语时，不能用that，也不能省略，
如：The book from which I got a lot of useful information was written by a famous scientist.
我从中得到许多有用信息的那本书是一位著名科学家写的。
但是当介词放在从句末尾时，作为介词宾语的关系代词可以用that 并且可以省略。
如上头两句可改为：
The book (that /which) I got a lot of information from was written by a famous scientist.
2.指物的关系代词which和that的用法：
(1)作主语
This is the instruction manual which/that tells you how to operate the computer. 这是那本教你如何操作计算机的说明手册。
(2)作宾语包括作介词宾馆。此种情况下的关系代词可以省略：
The chair (which /that) you broke yesterday is now being repaired. 你昨天弄坏的那把椅子现在正在修理。
The accounts of the company, (which/that) I’ve been paying great attention to, are in balance.
我一直非常注意的公司账目，是保持平衡的。
3.whose 和of which 指代人或事物，作定语。of which 可用whose 代替;
The car whose lights (of which the lights/the lights of which) were all broken was my father’s.
那辆所有的灯都破了的汽车是我父亲的。
That is the book whose cover (of which the cover/the cover of which ) was broken. 这就是那本封皮破了的书。
4.关系代词的格应与它在从句中充当的成分一致。特别要注意插入语，
如：Peter is the one who everybody believes will fail to bring off the contract. Peter 是那个人人都认为不能完成合同的人。(everybody believes 是插入语) At the election I voted for the man whom I believed to be the most suitable. 在选举的时候我投了我认为最合适的那个人的票
5.关系代词作从句的主语时，从句的动词必须和先行词的人称和数一致： 例：These are the operating instructions that/which are written in English 。 这就是用英文写成的使用说明。
6.非限定性定语从句不用that，只用who(whose, whom)和which代表人和物;
例：Her brothers, both of whom work in America, ring her up every week。 她的兄弟们两个人都在美国工作每个星期都给她打电话。
7.关系副词(=介词+关系代词)： 关系副词 先行词 在从句中的作用 说明 when(=at / on / in /during which),非正式文体中，有时用that代替关系副词
where(=in / at which) 地点名词 地点状语
why=(for which) 只有reason 原因状语
例：I shall never forget the day when (=on which) we first met. 我永远也不会忘记我们第一次见面的那一天。
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