INTERJECTIONS

Interjections are words used to express strong feeling or sudden emotion. They are included in a sentence usually at the start to express a sentiment such as surprise, disgust, joy, excitement, or enthusiasm.

The meaning of an interjection might be expressed by a parenthetical sentence.

Examples:

“My son (I am sorry to say) died yesterday”.

Observe that a sentence substituted for an interjection is always parenthetial.The sentence “I am sorry to say” is as completely isolated from the sentence “My son died yesterday” by the parenthesis as the Interjection “alas!” is isolated from it by its own nature.