一、原因句型

He didn’t go to school because he was ill.
Since we are all here, let’s begin our meeting.
It might rain yesterday, for the ground was wet.
Now (that) we have finished the work, we can go home.
I am glad to meet you.
I am sorry that I hear that.
Thank you for your help.
That is why he failed to come.
He didn’t come because of/on account of the weather.
I succeeded thanks to his help.
This failure is due to the fact they lack experience.
Owing to our joint efforts, the task was fulfilled.
What are studying English for?
For what reason did you choose this?
What’s the point of asking his to do that?
How come you never told me about it?
What with the wind and what with the rain, our walk was spoiled.

二、目的句型

He stopped aside so that she could go in.
He sits in the front in order that he can see words clearly.
He gets up early so as to/in order to have time to do exercises.
He repeated it for fear that there should be any mistake.

三、结果句型

It was very cold, so that the river froze.
They cost a lot of money, so/therefore we use them carefully.
He is such a good man that every one likes him.
He ran so fast that no one could catch him.
He hurried to the house only to find that it was empty.
I was caught in the rain. As a result, I had a bad cold.