yes you have to because it can be helpful to the reader.
You use commas between items in a list, between the date and the year, and after the greeting in a friendly letter.
After the day but not necessarily after the year
Only when you are listing should you use commas between adjectives. Hope this helped :)
Monday 27 April 2009 Is the correct layout. DO NOT use commas. Commas separate elements of a sentence from each other. A date is a collective element. To use the below would be wrong: Say if you use today's date: Monday, 27 April, 2009, or Monday, April 27th, 2009.
Yes, Mexicans use commas in writing to separate items in a list, to mark off introductory words or phrases, and to separate clauses in a sentence. The use of commas in Mexican Spanish follows the same principles as in other varieties of Spanish.
Compound or not, never separate a subject from its predicate with a comma.
smeell sqiuirly
You can find tips on correct use of commas on grammar.ccc.commnet.edu/grammar/commas.htm
Yes, you can use two commas in one sentence. Commas are used to separate elements in a sentence, such as lists, clauses, or phrases. Just be sure that the commas are placed correctly to avoid confusion in the sentence's meaning.
Commas should be used after the first term, stopping at the "and" of the last term, if you don't use oxford commas. For example: There was a dog, cat, bird, fish and monkey. If you do use oxford commas, the comma goes before the and, as well: There was a dog, cat, bird, fish, and monkey. You never use the comma before the last term.
I do not use commas.
inverted commas