Final answer:
The task involves three separate parts: translating present tense irregular verbs to the past tense, selecting the correct homophones, and correctly applying punctuation in given sentences.
Step-by-step explanation:
The exercises provided focus primarily on understanding the correct usage of past tense verbs, homophones, and the effects of punctuation. For the first part, students must apply their knowledge of irregular verbs and their past forms such as begin/began/begun. The subsequent part emphasizes correctly choosing words based on their meaning and spelling, which involves homophones like to/too/two and their/there/they're. Finally, inserting or omitting commas to clarify the meaning of sentences is an exercise on punctuation, which heavily impacts the readability and understanding of written English.