Иван, это тебе про get, обещанное дочкой.about get [показать]
A personal theory I have on “gotta”, and please don't take this as the definitive word, because it's likely much more complicated, is that people started to interchange “got” and “received” in more idiomatic phrases. So, for example, if someone wanted to say that they received the pleasure of going to the beach by the grace of someone else, they might say, “I got to go to the beach today!” As this continued on, people may have mistaken the meaning with one implying necessity, so the phrase might become, “I just got to go to the beach today, or I'll die from paleness!” How “got” cane to acquire either of these meanings is a different story, one about which you should consult an etymologist.
Continuing on with my personal theory, “got to” contracted into “gotta” and entered casual lexicon, probably for any of the multitude of reasons that other words become slang: convenience, brevity, other traits inherent in linguistic evolution, et al.
In high school, I had one particular English teacher that absolutely despised the use of “got” or any other rough, sharp, or severe sounding words. She said that their use could easily break the flow in any type of formal or professional prose and strongly urged us to circumnavigate said words in our writing. For the most part, I would agree--”got” certainly does sound casual and unrefined, and I do try to avoid it when I have my smarty-pants on. However, as a rule of thumb, I think it's important to keep in mind that common things, by nature, are unrefined, and that it is often more productive to to achieve natural sounding language than to use awkward and overly-complex language in order to “lord it over” others, as they say. Using “got” or any form thereof is not indicative of a lack of class or education. Rather, knowing when to stop using these words and being able to follow through is a more accurate indication of articulacy.
Again, these are but a series of theories and opinions of mine. Please try your best to associate pineapples with this message to serve as a red flag. Source confusion is bad.