Shokirova ziyoda

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The Oxford English Dictionary (OED) is widely regarded as the accepted authority on the English language. It is an unsurpassed guide to the meaning, history, and pronunciation of 600,000 words— past and present—from across the English-speaking world.
As a historical dictionary, the OED is very different from dictionaries of current English, in which the focus is on present-day meanings. You’ll still find present-day meanings in the OED, but you’ll also find the history of individual words, and of the language—traced through 3 million quotations, from classic literature and specialist periodicals to film scripts and cookery books.
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EXERCISES:

UNIT 6. PRONUNCIATION IN SLOW AND FAST SPEECH
In different contexts we change the speed at which we speak.
We are likely to speak more slowly, for example, when we are talking to a large audience, or when we are talking about an unfamiliar or difficult topic .
We are likely to speak more quickly, for example, in conversation, when we are talking to friends or relatives, or when we are talking about routine or familiar topics.
Fast Speech
Have you ever wondered how it is that people outside the English classroom, speak so quickly? Well, from this page, you can find out all you need to know, to finally be able to understand them!
One thing to remember: even though we have all these pronunciation changes, they are still very consistent, so usually the fast way to say something is just a change in pronunciation to one other form - that native speakers can understand - and use themselves, everyday!
There are 4 basic aspects to fast speech

1. 
   Abbreviations
   
2. 
   Changes in pronunciation
   
3. 
   Weak forms
   
4. 
   Linkage
   

Abbreviations
You are probably already familiar with abbreviations (short forms) of spoken words, for example (e.g.)
I am = I'm, You are = you're will not = won't could not = couldn't