Gyowanny,
Recentemente a mesma pergunta foi feita no site da BBC. Veja só a resposta dada por um especialista em Linguistica Aplicada:
1: Could you please teach me the difference of 'begin' and 'start'? I looked up the dictionary but they seem to have the same meanings. I would like to ask if these words have the formal or informal meanings.
Another difficult one! I think there is only a slight difference, which is that if you begin doing something it can suggest that the same thing happens quite often. E.g. I begin writing my blogs at 7pm every day. On the other hand, ‘start’ is more often used the first ever time you do something. For example, ‘I started playing piano when I was 6’. Oooh it’s a very small difference and I think you can use them fairly interchangeably. Do our readers have any other ideas?
Fonte:
http://www.bbc.co.uk/worldservice/learn ... 0211.shtmlI hope that helps!