Verb Tense & Grammatical Structures
It's Dark in Here: Shel Silverstein
Invictus: William Ernest Henley
Carry On: Robert W. Service
If: Rudyard Kipling
The Cremation of Sam McGee: Robert W. Service
The Raven: Edgar Allan Poe

Simple Present, Present Continuous, Adverbs of Adjectives
Simple Present, Prepositional Phrases
Simple Present, Present Continuous, Imperative Mood
Real Conditionals, Periodic Sentence
Simple Past, Past Continuous, Adverb Clauses of Degree
Simple Past, Complementing Verbs, Present and Past Partiple Adverbs & Adjectives