1. The document discusses various aspects of learning English including differences between English and Chinese, forms of English verbs, tenses, and provides an exercise to test understanding of tenses.
2. It introduces past participle as the form of the main verb used in the perfect tense and provides tables of tenses including present simple, present perfect, past simple, and future simple.
3. Contact information is provided for Mr. Priestley C.K. Lam who wrote "A Rose – A Key to Learn English Well."