Interjection is considered as the oldest word in the life of language, because the interjection is the earliest form used by humans to communicate. Interjections always stand alone as a series of words intact.

A few things to note about exclamations: 

1. Interjection (interjection) is just an exclamation sound that is used for express feelings (happy, surprised, bored, irritated, amazed, angry, doubtful, sick, sad, excited, surprised and so on) and interjections it ends with an exclamation point (!), for example:

Happiness/joy:

  • Hurrah!/hurray!
  • Ha!
  • Huzza!
  • Ha ha!

Sadness:

  • Oh!
  • Ah!
  • Alack!
  • Alas!

Agreement!

  • Bravo!

Boredom/anxiety:

  • Heigh-ho!

Encouragement:

  • Heave-ho!
  • Hail of the chief!

Attention:

  • Look!
  • Hist!
  • Hark!
  • Hush!

reproach:

  • Look!
  • Hist!
  • Hark!
  • Hush!

2. There are certain expressions used to express feelings that strong, for example:

  • Adieu!
  • Alack a day!
  • Bad luck to it!
  • Dear me!, oh dear me!, oh dear!

3. There are certain verb modes and parts of speech that can be used in the sense of exclamation or exclamation sentences, for example:

a. Noun-infinitive:

  • To suppose that he could be pardoned!
  • To think that he should have died!

b. Subjunctive:

  • Would that I were rich!
  • Would that he were still alive!

c. Imperative:

  • Look!
  • Hear! Hear!

d. Noun:

  • Poor thing!
  • Terrible news!

e. Pronoun:

  • What a sight you are!
  • What a blow it was!

f. Adjective:

  • Shocking!
  • Strange!

g. Adverb:

  • How beautiful!
  • There goes the bus!

h. Conjunction:

  • If we only known!
  • If I could only see her once more!