TEFL Videos - English Lesson - Future Perfect Tense

The parts of speech were taught in this unit. Following parts are usually included in sentences: definite/indefinite article, adjective (comparative/superlative), noun, preposition, verb, adverb, conjunction, gerund, and infinitive. From this unit, I learned that how to explain a very complicated sentences by simply dividing the structure into several simple parts. I think it's an efficient way to teach students who's first language are not English.