The document discusses several English grammar topics including modal verbs, phrasal verbs, future tense, tag questions, and using "do" and "does" to add emphasis. Modal verbs like must, have to, should and ought to are used to indicate obligations or suggestions. Phrasal verbs combine verbs with prepositions or particles to modify meaning. Future tense can be expressed using "will" or "be going to". Tag questions are used to confirm or deny information and use the opposite auxiliary verb. "Do" and "does" can be used in affirmative sentences to add emphasis. Examples are provided for each topic.