Interjections demonstrate emotion and are usually separated from the rest of the sentence by an exclamation point, and sometimes by a comma if the emotion is less stressed.
Some examples would be:
Often, most often, it begins the sentence, but this is not a hard, fast rule.
The sentence that introduces the paragraph's main idea
The topic sentence, the body with supporting sentences, and the clincher sentence
To support your answer. It shows the reader why you chose to write about this.
A topic sentence in a paragraph about pet ownership should be a lead-in to what the paragraph is about. An example of a topic sentence is, Pet ownership is a great responsibility, but the rewards are worth it.
Concrete nouns and active verbs create a more powerful effect in quality writing.
Ernest Henry Shackleton was known as a brave explorer who was also cautious and wise when he traveled.
A paragraph that introduces a subject in the topic sentence and gives three examples of the subject in the body
The necessary and proper clause
(I think don't quote me-)
Setting up public schools ~ apex.
It wasn't clear whether state laws could inferfere with federal laws