The most indicative thing about American English is that it usually sounds very relaxed. Each word is not pronounced clearly on its own but rather in correlation with other words within the sentence. That’s why you may find native Americans speak in a really fast and swift manner. This has a lot to do with Reduced Sounds. (Prefer to read this in Vietnamese?)
What are they?
In many cases, a word’s spelling may fail to tell you how it would actually sound. Take photograph and photography for an example.