对于所有语言来说，因果“转折”后面的内容意味着说话人的核心，很多阅读技巧更要重视“转折”后面的内容，常用的“因果转折”表达有哪些。

陈述原因

Because: 因为

1）用了because，不要用so

because已能清楚表明因果关系，再加so是多余的。

2）句子必须是完整有因果关系的句子

Because I was sick 

I didn't go to work today because I was sick.

我今天没去上班，因为病了。

Because I was sick, I didn‘t go to work today.

因为我病了，所以今天没去上班。

Since: 因为、由于

比because稍微正式一些，可以在口语中使用

Since I was sick today, I didn't go to work.

因为今天病了，所以我没去上班。

As: 由于、鉴于

比because和since都更正式，可以在口语中使用

I missed your call as I was busy cooking.

我忙着做饭，所以没听到你的电话。

更加正式的方式

Due to: 由于、归咎于

Due to the rising cost of living in America, many young people are moving out of big cities. 

由于美国的生活成本不断升高，很多年轻人都在搬离大城市。

Considering: 考虑到（由于）

Many are switching to EVs considering their cost and environmental benefits.

考虑到开支和环境上的双重益处，许多人都开始买电动汽车。

陈述‘所以’

So: 所以

口语中最常用的“所以”表达，不适用于正式书写（马上教大家可以用的）。

The restaurant was full, so we had to go to another one.

饭店满了，所以我们不得不去另一家。

更正式的“所以”

以下这一组都是适合用于更正式场合的，尤其是书写中：

Therefore, Hence, Thus, As a result, Consequently

I did not receive any information about promotion, … 

我没有收到任何关于升职的消息，所以…. 

陈述‘虽然’

Although / Though / even though / 

大家千万要记住，用了although，绝对不要用but，是个语法硬伤，

Although / even though the wait was long, the food was amazing.

虽然等了很久，但是菜很好吃。

I like noodles. I don't like these noodles though. 

虽然我爱吃面，但我不喜欢这种面。

Despite, in spite of 

比although那组词更正式一些，在书写里用得更多 。

We still went hiking despite the rain.

尽管下了雨，我们还是去爬山了。

We still went hiking in spite of the rain.

尽管下了雨，我们还是去爬山了。

陈述‘但是’

But: 但是

I didn't like the movie, but my husband loved it.

我不喜欢那部电影，但是我先生喜欢。

However: 但是

比but要正式一些，但口语里也常用。

I didn't like the movie. However, my husband loved it. 

我不喜欢那部电影，但是我先生喜欢。

也可以用在句尾：

I didn't like the movie. My husband loved it, however.