Use commas to set off an unessential phrase or clause. Leave them out when the phrase is essential. Here are some examples: The copy machine that is in the vice president's office needs a toner cartridge. The copy machine, which is in the vice president's office, needs a toner cartridge. In the first sentence, the phrase that is in the vice president's officeis essential. The sentence implies there is more than one copy machine and the one in the VP's office is the one that needs toner. In the second sentence, the phrase set off by commas is unessential. The fact that the copier is in the VP's office is extra information and isn't needed to identify which machine needs service. Some grammar books and style guides insist that writers use the word that when introducing some essential clauses and the word which for introducing unessential ones.
it is an adverb
a clause is a phrase were you use detail commas
This is your answer (synonyms of necessary below)essential, indispensableincumbentneeded, needful, required, requisiteobligatory
Throughout (notice the missing hyphen) is both an adverb because of its ability to modify a verb and a preposition.Example:He sprinkled unnecessary commas throughout his writing. (preposition)He sprinkled unnecessary commas throughout. (verb)
An essential appositive provides crucial information that identifies or clarifies a noun in a sentence and is necessary for the sentence's meaning. It is not set off by commas, as omitting it would change the sentence's intended message. For example, in the sentence "My brother John is visiting," "John" is the essential appositive that specifies which brother is being referred to.
A comma is not needed when a sentence include an extra phrase that begins with and. This is a standard rule.
the use of essential and non-essential sentences
no
it is an adverb
The correct punctuation for the sentence "This is, in my opinion, depressing" would be to include commas around the phrase "in my opinion" to set it off as a non-essential clause.
It is called an appositive phrase when a phrase separated by commas provides extra information about a noun. This can help provide clarification or additional details about the noun in the sentence.
a clause is a phrase were you use detail commas
An appositive phrase renames a noun and is set off by commas.Example:My brother, Brian, likes spaghetti.
I believe that when you have an appositive in a sentence that when it is not necessary you surround it with commas and when it is necessary, you don't use commas. This is what I believe the rule is, but I am not 100% sure. Anyone feel free to correct me if this is in any way not correct.
Yes, when using "as needed" as an adverbial phrase in a sentence, you do not need commas unless the phrase interrupts the flow of the sentence. For example, "Medication should be taken as needed for pain relief."
No, an introductory comma is not typically used after an interjection or participial phrase. Commas are usually used after introductory clauses or phrases to separate them from the main clause, but for interjections and participial phrases, a comma is not necessary in most cases.
Not necessarily. There is no word or phrase in English that requires a comma.