In the first part of questions the diffrence is:won't meens ,,nu va'' and don't meens ,,nu face''. In the secont part of questions the diffrence is:case meens,,doar in caz ca'' and if it ,,daca''. In the therth part of questions the diffrences is:should meens ,,ar trebui'' and got meens ,,ia''. Sper ca te-am ajutat si sper ca-i corect..