At the end of a sentence.
End mark is a synonym for punctuation mark
This *might* be referring to end punctuation, i.e. the punctuation mark at the end of a sentence or question. It might be a period, a question mark, an exclamation mark.
The different punctuation at the end of a sentence are mostly period ("."), Question mark ("?"), Exclamation mark ("!").
There should be a question mark at the end: Did you go to the zoo last week?
It should be --- Look at you, go so fast.
The word end mark is a noun. An end mark is a punctuation mark which appears at the end of a sentence.
A period (.) is placed at the end of a declarative sentence.
Punctuation at the end of a sentence indicates a complete thought.
A question mark is a punctuation mark used to end an interrogatory sentence.
An interrogative sentence ends with a question mark.
A punctuation mark is put at the end of a sentence to denote the conclusion of an idea. The punctuation mark used here is mainly a period. However, if you use a question mark at the end of a sentence, then it is used to denote that the material before the question mark was a question. An exclamation mark is used to add emphasis to the before-stated material.
You can use an exclamation point to show surprise at the end of a sentence!