Ouch! Oh my! Wow! Yikes!
An interjection is a word that you use in between sentences or thoughts to express a sudden feeling.
Interjections usually express the feelings of surprise (both good surprises and bad ones) or excitement.
The most common coordinating conjunctions are for, and, nor, but, or, yet, and so ; these can be remembered by using the mnemonic device FANBOYS.
Examples:
You planned this party just for me ? Wow!
An interjection can be used before or after a sentence that explains what’s going on. Interjection can be used alone, but it would not make sense if the cause is not described. Interjections often use exclamation points, but they don’t necessarily have to.
An interjection can be used within a sentence. The interjection must be placed inside parentheses or set it off with commas.
Examples:
Interjections can be used in informal writing. However, avoid using interjections in formal writing because it may appear that you are not treating the topic seriously.