Formal to informal

1

100

Headquarters 

H.Q. 

200

Therefore 

So

300

I have sent a copy 

A copy has been sent 

400

The General Manager needs to be contacted

We need to get in touch with the GM 

500

Nevertheless, a bank loan of this nature will not be granted...

Anyway, we won't give you a bank loan like this 

But, we aren't gonna give you a bank loan like this 

2

100

October 

Oct. 

200

Complete (the business plan, the document, the paper) 

Fill in  

Fill out

300

Kindly inform us 

Please let us know 

400

In the interim 

In the meantime 

500

Some issues concerning your income may be queried 

We might ask some questions about your income 

3

100

We will 

We'll 

200

Furthermore 

And; Also; Plus 

300

What is your availability? 

When are you free? 

When could you come? 

400

You are required to bring this to the reunion 

You need to bring this to the meeting

500

It'll have to be authorized by Human Resources 

HR will have to okay it 

4

100

As soon as possible 

ASAP 

200

Discuss 

Talk about 

300

It was received 

I got it 

400

A meeting has been scheduled for November the 1st

We've set a meeting for Nov. 1st.  

500

Had this issue been know to us, you would have been informed 

If we'd known about this problem, we would've told you.  

5

100

Thank you 

Thanks 

200

Memorandum 

Memo 

300

Consider 

Think about 

400

This must be done at your earliest opportunity 

You need to do this asap 

500

Moreover, the previous letter sent was erroneous 

Also, the last letter you sent was wrong 

And the letter you sent before had mistakes