Parts of Speech: Noun, Verbs, Adjectives, Adverbs etc - Basic English Grammar

In this video, Alisha answers 4 questions. - Which one of these sentences is correct: "Are you mad with me?" or "Are you mad at me?". - What is the difference between "but" and "yet"? Explain please... - I have a question about similar words which start the same. For example, simultaneous, simultaneously, simulation. How do I understand these kinds of words and how do I use them? - I don't know how to use "in order to". Can you help me?