Consequently, English is sometimes described as a "world language" or a "global lingua franca". It is the world's most widely-used language in international business and telecommunications, newspaper and book publishing, scientific publishing, mass entertainment, and diplomacy.

Modal verbs are those verbs in English that help a sentence to have a better meaning thanks to its function. you can use them when you want to give another meaning to a sentence. For example, if you want to ask permission to speak or to know if they might come looking for you.