1. 用英語問原因
用於問原因的：
Why did you think so?
Could you tell me why you prefer to live in the country?
What makes you think so?
Why was that?
Why didn』t you go to the book-sale last Friday?
Why is life more peaceful in rural areas?
Do you know why he has turned down their proposal?
How come you are late so often?
Is that why you』re disappointed?
用以給出原因的：
I can』t come to the party.
I must prepare for my exam tomorrow.
Well, I』d love to, but actually I can』t make it.
I』ve got a lot of homework to do.
One reason is that……
And another reason is that…...
Because, you know, I don』t know how they actually felt.
My point is that……
The main reason was that……
Due to the ……
My reason for asking this question is……
Just because…