It depends on the tone that you are trying to portray. If you want to add a dramatic effect, then you could right the sentence with an exclamation. But the sentence could also be written with just a period.
Examples:
"Come here right now!" John's mother screamed.
or
"Come here right now," John's mother whispered as she slowly embraced him for a hug.
You normally use an exclamation mark after a command. "Come here!" is a command.
An exclamatory sentence conveys strong emotion, often excitement or urgency, and uses an exclamation point at the end. Statement as a command: Come here. Don't shove me. I said no. Exclamatory sentence: Come here! Don't shove me! I said no!
No, 'Is he should never have come here' is not a correct sentence and it should be 'He should never have come here.'
You can use an exclamation mark after an interjection to convey strong emotion or excitement, such as "Wow!" or "Ouch!" It is not necessary to always include an exclamation mark after an interjection, but it can emphasize the intensity of the feeling being expressed.
The three types of sentences are: declarative, exclamatory, imperative, and interrogative.A declarative sentence is about facts: The sky is blue today.An exclamatory sentence shows strong feelings and has an exclamation mark. Help!An imperative sentence is a command or request. Please come here now.An interrogatory sentence is a question. Can I use your pen?
The word here is an adverb. For example in the sentence "Come here" come is a verb, and it is modified by here. (This is actually a sentence with a substantial implied section; it means I want you to come here.)
No, the sentence "Come here once" does not violate any rules of grammar. It is a complete sentence with a subject ("you" understood) and a verb ("come") that expresses a complete thought.
Our sheriff is right here.
Have you been here before? Come here! Jon is coming here tomorrow.
I would come here more often if I knew you would be here.
come here as son as you can
The superintendent is on his way here right now!