连接词帮助你把观点或是句子连接起来，以便人们能够理解你的意思。
举例说明
For example 例如
For instance 例如
Namely 即，也就是
一般的举例用for example或for instance，namely用于引用出定义的某物，如：
There are two problems: namely, the expense and the time.
增加信息
And
In addition
Also
Too
Furthermore
Moreover
Apart from
In addition to
Besides
and是常用的连接词。当你列举事物的时候，在两项之间要用逗号隔开，除了最后用and连接的那项。如：
We discussed training, education and the budget.
also用来增加额外的事项或强调，如：
We also spoke about marketing.
你也可以把also和not only一起用来表示强调。
We are concerned not only by the costs, but also by the competition.
also一般不用在句子的开头。如果在句子的开头要表示also的意思，可以用in addition或in addition to this……
as well as可以用在句子的开头或句中。
As well as the costs, we are concerned by the competition.
We are interested in costs as well as the competition.
too用在句末或跟着描述对象。
They were concerned too.
I, too, was concerned.
apart from和besides是“除……之外”的意思。
Apart from Rover, we are the largest sports cat manufacturer.
Besides Rover, we are the largest sports cat manufacturer.
moreover和furthermore在你的表述之外增加额外的信息。
Marketing plans give us an idea of the potential market. Moreover, they tell us about the competition.
营销计划给出了潜在市场的意见。此外，还告诉了我们竞争状况。
总结
In short
In brief
To summarise
In a nutshell
To conclude
In conclusion
这些词通常用在结尾句的前面。
先后顺序
The former,…the latter
Firstly, secondly, finally
The first point is
Lastly
The following
当你需要提到两个中的某一个的时候，用The former和the latter
Marketing and finance are both covered in the course. The former is studied in the first term and the latter is studied in the final term.
营销和金融都包含在课程里，前者在第一学期，后者在最后一期。
Firstly,…secondly,…finally/lastly可用于列出观点。几乎没有fourthly或fifthly的用法，如果要表达更多的观点，可以用the first point, the second point, the third point……
The following是引出列举的好方法
The following people have been chosen to go on the training course: Buttcher, Fire and Doo.
给出原因
Due to/ due to the fact that
Owing to/ owing to the fact that
Because
Because of
As
Due to和owing to后面必须接名词。
Due to the rise in oil prices, the inflation rate rose by 1.25%.
Owing to the demand, we are unable to supply all items within 2 weeks.
若是想在它们后边接子句，就必须加上the fact that在中间。
Due to the fact that oil prices have risen, the inflation rate has gone up by 1%25.
Owing to the fact that the workers have gone on strike, the company has been unable to fulfil all its orders.
Because / because of
Because of 后边接名词
Because of bad weather, the football match was postponed.
Because可用在句首和句中，如：
Because it was raining, the match was postponed.
We believe in incentive schemes, because we want our employees to be more productive.
Since和as也是因为的意思
Since the company is expanding, we need to hire more staff
As the company is expanding, we need to hire more staff.
给出结果
Therefore
So
Consequently
This means that
As a result
Therefore、so、consequently和as a result用法相似，So比较不正式些
The company are expanding. Therefore / So / Consequently / As a result, they are taking on extra staff.
对比和差异
But
However
Although / even though
Despite / despite the fact that
In spite of / in spite of the fact that
Nevertheless
Nonetheless
While
Whereas
Unlike
In theory… in practice…
But比however不正式些，通常不用在句首。
He works hard, but he doesn’t earn much.
He works hard. However, he doesn’t earn much.
Although、despite和in spite of引出一个相对的观念。
Although it was cold, she went out in shorts.
In spite of the cold, she went out in shorts.
Despite、in spite of与due to、owing to用法一样，其后必须接名词，若要接句子或动词，就要用到the fact that了。
Despite the fact that the company was doing badly, they took on extra employees.
Nevertheless和nonetheless是仍然、不过的意思
The sea was cold, but he went swimming nevertheless.
The company is doing well. Nonetheless, they aren’t going to expand this year.
While、whereas、unlike用来表示两个事物的不同。
While my sister has blue eyes, mine are brown.
Taxes have gone up, whereas social security contributions have gone down.
Unlike in the UK, the USA has cheap petrol.
In theory… in practice…表示意想不到的结果
In theory, teachers should prepare for lessons, but in practice, they often don’t have enough time.
资料来源：english-at-home.com