Better：We are writing to inform you...

Inferior：We beg to inform you...

Better：We shall be pleased to hear from you soon.

Inferior： The favor of your early reply will be helpful.

Better：According to

Inferior : As per...

Better：365 days a year 

Inferior：365 days per year

Better: As soon as possible 

Inferior：At your earliest convenience

Better：We enclose/attach herewith/hereto...

Inferior： Enclosed herewith/Attached hereto please find...

Better: of today 

Inferior：of even date

Better：soon

Inferior：in the near future

Better：Your request will have our careful consideration.

Inferior：Every consideration will be given to your request.

Better: How do you explain the fact?

Inferior：How do you account for the fact?

Better： As your demand is unusual...

Inferior：Due to the unusual nature of your demand... 

Better： We note with pleasure...

Inferior： It is our pleasure to note...

Better：Unfortunately,...

Inferior：It was unfortunate that ...

Better: I hope to hear from you soon.

Inferior：Hoping to hear from you soon...

Better : I trust you will approve of our demand. 

Inferior：Trust this will meet with your approval.

Better：We have referred your request to ... 

Inferior：Your request has been referred to...

Better：Thank you for your letter of...

Inferior：We welcome your esteemed favor of...

Better：Refening to your...

Inferior：With reference to/in response to...

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