This is owing to …
due to …
a result of …
because of …
注：owing to 通常用于不好的消息。如果想在原因中使用动词，请加上the fact that的从句。
You have seen an advertisement in the newspaper for a post as office manger. You want an application form.
I would appreciate it if you could send me an application form.
The photocopier in your office has broken down. You want to have it repaired, quickly.
We would be grateful if you could send a repairman to fix our photocopier as soon as possible.
You have moved your office and you want the post office to forward your letters to your newaddress.
Please could you forward my letters to my new address.
You want the telephone company to put another telephone in your office. You need it urgently.
We would appreciate it if you could put another telephone in our office immediately.
You have written to a company and you want them to reply quickly.
I would be grateful if you could give us a reply quickly.
Please could you … as soon as possible.
We would be grateful if you could … without delay.
We would be appreciate it if you could … immediately.
注：please could you … 是最直接的方式。在要求一些一般性的事情时，可以使用这种表达
We must apologize for …
We apologize for …
We are extremely sorry for …
Please accept our apologies once again.
We hope that this has not caused you any inconvenience.
With apologies once again.
Please could you
We would be grateful if you could
We would appreciate it if you could
give us further details about ..
inform us (about/if) …
let us know ( about/if ) …
We would like to know ( about/if ) …
You wrote a letter to someone and they haven’t replied. You want to know if they received the letter.
We would be grateful if you could let us know if the letter has reached you.
A businessman is going to your country. He wants you to get a visa for him. You need all the details about his passport (his nationality, date of birth, where his passport was issued, and when it expires).
Please could you give details about your passport. I would like to know your nationality, date of birth, where your passport was issued and when it expires.
You want to know about the same businessman’s flight (flight number, date and time of arrival).
In particular, I would like to know your flight number, date and time of arrival.
increase prices --- fall of the dollar
We have been force to increase our prices. This is owing to the fall of the dollar.
Delay the delivery of the goods --- strike by airline pilots