Interjection

In grammar, interjections is a lexical category used to express an isolate emotion or sentiment on the part of the speaker. Sometimes, interjections combine with other words to form sentences, but not with finite verb.

Example of interjections :

Interjection	Meaning	Example
Ah	Expressing pleasure Expressing realization Expressing resignation Expressing surprise	“Ah, that feels good.” “Ah, now I understand.” “Ah well, it can’t be heped.” “Ah! I’ve won!”
Alas	Expressing grief or pity	“Alas, She’s dead now.”
Dear	Expressing pity Expressing surprise	“Oh dear! Does it hurt?” “Dear me! That’s a surprise!”
Eh	Asking for repeatition Expressing enquiry Expressing surprise Inviting agreement	“It’s hot today. ”Eh?” “I said hot today.” “What do you thimk of that, eh?” “Eh!  Really?” “Let’s go, eh?”
Er	Expressing hesitation	“Lima is the capital of….er… Peru.”
Hello, hullo	Expressing greeting Expressing surprise	“Hello John. How are you today?” “Hello! My car’s gone!”
Hey	Calling attention Expressing surprise, joy, etc	“Hey! Look at that!” “Hey! What a good idea!”
Hi	Expressing greeting	“Hi! What’s new?”
Hmm	Expressing hesitation, doubt or disagreement	“Hmm. I’m not so sure.”
Oh, o	Expressing surprise Expressing pain Expressing pleading	“Oh! You’re here!” “Oh! I’ve got a toothache.” “Oh, please say ‘yes’!”
Ouch	Expressing pain	“Ouch! That hurts!”
Uh	Expressing hesitation	“Uh.. I don’t know to answer that.”
Uh-huh	Expressing agreement	“Shall we go?” “Uh-huh.”
Um, umm	Expressing hesitation	“85 divided by 5 is …. Um …. 17.”
Well	Expressing surprise Introducing a remark	“Well I never.” “Well, what did he say?”