雅思写作从语和句型
Group 1
1.…,which leads to…
2.with…,…
with结构除了表示“随着”，也可以表达“因为”。后面记得不接常规完整句子，而是名词，或者一些分词的形式。
例句：I couldn’t sleep with the noise of the traffic.
3.The reason why…is that…
The reason why后面接结果，is that后面加原因，都是写完整的句子。
4.This is because…
5.The main/primary reason is that….
6.That is why….
例句：That is why this year is likely to be just the beginning of many discussions like the one at the Munich security conference.
7.It is only because…that…
例句：It is only because we have become used to these extraordinarily fragile structuresthat this demand seems so outrageous.
Group 2
1.…,leading to…
2.…,thus doing…
3.…,thereby doing…
例句：Unions often rely on volunteers to administrate,thereby keeping costs at a minimum.
4.thereby
例句：This is due to ignorant motorists who fail to stop and thereby put the lives of her and the children at risk.
5.leading to
这个可以用任何其他表示"导致"的词汇去替换。
例句：A second object was described to be identical to the one seen by the second mission,leading to the same conclusion as to its risk.
后两个句子种的doing，要根据句子本身表达的内容去写对应的动词。thereby单独用的时候，一般在句中，做一个普通的副词。
Group 3
1.be a contributing factor
例句：Human error may have been a contributing factor.
2.be a factor contributing to
3.be a contributory cause of
例句：Smoking may be a contributory cause of the disease.
4.be contributing to
be a major contributor to
attribute…to…
…be attributed to
…be attributable to
contribute和attribute某种程度来讲是一对反义词。前者是A促成了B，后者是把B归因于A。所以后者更多用被动来表达。
例句1：Supermarkets are the main contributors to this mountain of food.
例句2：Juvenile delinquency can be attributed to parental permissiveness.
例句3：The health problems are attributable to a poor diet and lack of exercise.
Group 4
第1、2个表达强调后面的原因是最重要的，后面3个都表达这个原因是相对次要的。
1.…,not least because…
2.…,in large part because
例句：Despite well-intentioned policies and laws,the situation on the ground is often quite different,in large part because of the difficulty of enforcement,both within and across borders.
3.…,if for no other(better)reason than
例句：It is essential,if for no other reason than for a unity in teaching,that each member of the school community adopts a common outlook on life.
4.…,because at least…
例句：Monotony is a big problem for the moralist because at least half of human's bad habits result from his fear of it.
5.…,if only because
例句：We are confident if only because we are making progress.
Group 5
1.…so…that…
2.So…that…
例句：So scarce is the food that many people suffer from starvation.
3.Such…that…
例句：Such is the moment that all greats traverse.
4.…enough…that…
例句：Another excellent way to eliminate error messages is to make the application smartenough that it no longer needs to make unnecessary demands.
这几个词组都是围绕常规的“如此…以至于…”句型的一些变形。so后面加形容词，such后面加名词，他们两个放句首，需要倒装。
这个表达在因果关系中并不特别普遍。不是每次的原因，而是so/such之后。
