Linguistic reduction

Linguistic reductions are lost sounds in words, which happens in spoken English. For instance, "going to" changes to "gonna". The most common reductions are contractions. Most contractions are reductions of 'not'. For instance, "cannot" becomes "can't". Many contractions are reductions between a subject and a verb. For instance, "He is..." becomes "He's..."
Some reductions are known to language learners, such as the reduction of a verb and "to". Examples are "going to" becoming "gonna" and "want to" becoming "wanna".
Linguistic reductions are part of natural English and should not be considered slang or improper.
Categories.
There are several basic categories of reductions: