雅思写作高分必备的定语从句详析
定语从句，绝对的雅思写作高分作文必备。它可以把几个充满屌丝气息的短句子瞬间连成一个高端大气上档次的长难句。它可以准确巧妙的对名词或者名词短语做出锦上添花的限定或者修饰。
为了写出高分作文，首先我们需要来认识一下常见的关系代词(relative pronouns)
who —— 用来指人
The students, who have acquired practical skills, can hunt for jobs in a short time.
Some people believe that innate talent is what differentiates a person who has been trained to play a sport or an instrument, from those who become good players.
As the policy would also affect the cost of public transport, it would be very unpopular with everyone who needs to travel on the roads.
which ——用来指物
France used coal as a source for only 25 units of electricity in 1980, which was matched by natural gas.
But by 2000 nuclear power, which was not used at all in Australia, had developed into the main source, producing almost 75% of electricity, at 126 units.
that ——用来指人或物
I personally think that some people do have talents that are probably inherited via their genes.
But there are various other measures that could be implemented that would have a huge effect on these problems.
It takes ten days for each egg to become a silkworm larva that feeds on mulberry leaves.
Find someone thatcan assist the students to improve their social skills.
where ——用来指地方
The biggest gender difference is at the lowest post-school level, where 90% of those who held a skilled vocational diploma were men.
when ——用来指时间
This cost decreased to only 5% of total expenditure in 1991 but rose dramatically in 2001 when it represented 23% of the school budget.
whose ——用来指所有
The result was a remarkably cohesive ensemble whose members seemed to have telepathic powers of communication.
Consumers, whose purchases account for about 70% of economic activity, face a variety of challenges.
why——用在the reason / reasons 后面
The pie chart shows the main reasons why agricultural land becomes less productive.
There are two important reasons why the Underground is safer than the overground railways.
限定性定语从句：
1.在名词后面给出限定名词的信息。
Find someone that can assist the students to improve their social skills.
2.如果没有这些关系从句，所指的人，地点或物都是不清楚的。
Find someone that can assist the students to improve their social skills. (we do not know who)
3.关系代词指的限定性关系从句中的宾语从句中的宾语时，可以省略。
Maybe there's a method (that) students can use.
非限定性定语从句从句：
1.给出事物额外信息。
The students, who have acquired practical skills, can hunt for jobs in a short time.
2.不使用that
France used coal as a source for only 25 units of electricity in 1980, which was matched by natural gas.(which 不能换成that)。
3.必须要逗号来隔开从句和主句。
But by 2000 nuclear power, which was not used at all in Australia, had developed into the main source, producing almost 75% of electricity, at 126 units. (逗号不能省略)
4.不能省略关系代词。
The biggest gender difference is at the lowest post-school level, where 90% of those who held a skilled vocational diploma were men. (not The biggest gender difference is at the lowest post-school level, 90% of those who held a skilled vocational diploma were men)
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