In a basic statement, we usually stress the last content word in a phrase by raising our pitch and lengthening the vowel.  Word stress can change depending on what we are emphasizing and whether we are answering a question.  Watch the video for details, then practice with these simple sentences.

Let’s look at the words “no” and “not.”  Firstly, a quick look at how Americans pronounce these two words.

No has the American O /oʊ/, which is a diphthong.  That means we start on one vowel sound and slide to another.  In this case, we slide from o to ʊ.  Basically we start with very rounded lips and then relax them a bit and close our jaw,  raising our tongue

For most people, just holding the “o” longer is enough to achieve the right sound.

Not has the vowel /ɑ/, which isn’t rounded and needs to be made with the jaw fairly open, and the tongue down and back.
In connected speech, Americans use a stopped t on not, making the t without releasing the air.

It’s okay to use a t sound, but to get that typical American sound you need the stopped t. Be careful not to drop the t off entirely, though.

In this video, we’ll look at when to use no and when to use not in sentences.

Use no before a noun when you’re not using an article (a or the).
For example: 
There is no mail.
We have no time.

You also use no before an adjective and noun:
There’s no good time for it.
We have no real issues with it.

We don’t use no before the words any, much, many, or enough.

Use not before nouns when you’re using an article (a or the) with the noun.

That’s not a good idea.
That’s not the right flight.

We use not before the words any, much, many, or enough.

There’s not any reason for it.
There’s not much left.
Not many people know that.
There’s not enough time left.

Use not to make a verb negative:

We could not do it.
They have not called.

For most verbs with not, Americans will use a contraction.  Could not becomes couldn’t,
have not becomes haven’t.

We couldn’t do it.
They haven’t called.

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The word the /ðə/ is the most frequently used word in English.  If you have difficulty pronouncing the voiced th /ð/ sound correctly, you might benefit from practicing the word the in the contexts in which it occurs most frequently in English.  Use the word lists and recordings below to improve the speed, accuracy and fluency of your speech.

Repeated Phrase Practice for the:
Use the recording below to hear how these phrases are spoken in running speech.  Then, create your own repeated phrases with the.