If by "am" you are referring to time, below is an example of Associated Press style:
10:30 a.m.
The word "am" by itself does not require any punctuation. If used within a sentence, it would be punctuated accordingly based on the surrounding words and structure of the sentence.
before a punctuation.
It's not a specific punctuation mark. It refers to using full (all) punctuation marks where necessary.
a close punctuation means a punctuation at the end of each sentence
A colon.
No. A comma is a punctuation mark.
before a punctuation.
It's not a specific punctuation mark. It refers to using full (all) punctuation marks where necessary.
a close punctuation means a punctuation at the end of each sentence
A colon.
None, open punctuation means there is no punctuation after the salutation or the complimentary close.
Grammar Diction Tone Punctuation
Words are not made out of punctuation.
No. A comma is a punctuation mark.
Spelling is a matter of mechanics, as it relates to the correct arrangement of letters to form words. Punctuation and capitalization are more related to grammar and style.
Yes, an apostrophe is a punctuation mark used to indicate either possession or contraction in writing.
Punctuation has been used since ancient civilizations, with early forms appearing in Greek and Latin texts. The modern system of punctuation, as we know it today, began to evolve in the Middle Ages with the work of Ancient Greek and Roman scholars. The first standardized system of punctuation was developed in the Renaissance by Italian printer Aldus Manutius in the late 15th century.
Traditional Japanese haiku typically do not use punctuation. However, modern haiku in English may include punctuation for clarity or emphasis.