informal ways. it's not useful to study English only its grammar, meaning or usage, but we have to study about pronunciation. pronunciation is very important to communicate to others. when you say wrong pronunciation, other people don't understand and sometimes there's wrong meaning too for example when you speak "l like to eat french fly" instead." or "he likes crying." instead "he likes climbing", there is misunderstanding between people. so we have to say words or sentences in correct pronunciation because there will be good communication among people. are you good language pronunciation?