一、原因句型
He didnt go to school because he was ill.
他没去学校是因为他生病了
Since we are all here， lets begin our meeting.
因为大家都在，来开始我们的会议吧。
It might rain yesterday， for the ground was wet.
昨天可能下雨了，因为地面是湿的。
Now (that) we have finished the work， we can go home.
因为工作已经做完了，我们可以回家了。
I am glad to meet you.
很高兴见到你。
I am sorry that I hear that.
很抱歉听说了这件事
Thank you for your help.
谢谢你的帮助
That is why he failed to come.
这就是为什么他没来。
He didnt come because of/on account of the weather.
因为天气原因他没有来。
I succeeded thanks to his help.
我成功感谢他的帮助。
This failure is due to the fact they lack experience.
这次失败是因为他们缺乏经验。
Owing to our joint efforts， the task was fulfilled.
由于我们的共同努力，这个任务完成了。
For what reason did you choose this？
你为什么选择这个？
How come you never told me about it？
你怎么从没跟我说过？
二、目的句型
He stopped aside so that she could go in.
他停在边上，以便她能过去。
He sits in the front in order that he can see words clearly.
他坐在前排，以便能清楚的看到文字。
He gets up early so as to/in order to have time to do exercises.
他起得早是为了有时间做锻炼。
He repeated it for fear that there should be any mistake.
他重复了一遍，以防有误。
三、结果句型
It was very cold， so that the river froze.
天气太冷了以至于河面都结冰了。
They cost a lot of money， so/therefore we use them carefully.
他们花了很多钱，所以，我们很谨慎的使用他们。
He is such a good man that every one likes him.
他如此好以至于所有人都喜欢他。
He ran so fast that no one could catch him.
他跑的太快了，没人能追上他。
He hurried to the house only to find that it was empty.
他急匆匆到了这个房子，结果发现空空如也。
I was caught in the rain. As a result， I had a bad cold.
被雨淋了后，我重感冒了。