Can someone help me write sentences for these patterns?
Pattern A: Subject + comma + nonessential clause + comma + verb + object
Pattern B: Subject + essential clause + verb + object
Pattern C: Introductory phrase + comma + nonessential word + comma + subject + verb + object
Pattern D: Subject + verb + object + comma + nonessential phrase

Explanation:

First, a quick recap:

Nonessential elements of a sentence are words, set of words (phrases) or clauses that can be left out of the sentence without altering its meaning, unlike the essential elements which have opposite feature.

Introductory phrase is a set of words that provides setting for a sentence.

So, for example, we could say:

A: William Shakespeare, famous writter, wrote many plays.

B: The dog that I found by the river hates swimming.

C: On monday morning, luckily, I found my keys.

D: I visited Paris, the capital of France.

Note that nonessential elements are always separated by commas.

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking. 

c) vampires in history and modern life.