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.
a verb that causes the subject to perform the action.
The sentence that introduces the paragraph's main idea
Captain carpenter humbly accepted the purple heart.
that person and the films
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.
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
Rephrasing a thesis.