u/Many-Inflation5544

I'll just never get used to a short and barely distinguishable sound chunk like "on a" meaning something as specific and important for comprehension as "we have" because it sounds like it should be at most an article or a preposition but it carries more significant meaning and it's just too short and fast, there's nothing to grab on to sound wise, doesn't sound distinct in the middle of a sentence. How am I even supposed to catch this in fast speech, differentiate from all the other chunks that sound the same when context isn't obvious, etc.