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Not necessarily. Only use a comma when the final please is a request. For example, we say Do as you please; but Sit down, please.
You can use a colon after please note, but you could also use the word that. You can say something like, Please note: we are starting early. Or you can say, please note that we are starting early.
The comma is an overused bit of punctuation. It is meant to separate ideas and to indicate pauses in speech. Try to avoid using a comma unless it seems necessary for the sake of clarity. A comma comes before "please" only if it begins a new clause, or to indicate an impatient, long-suffering attitude. For example we normally write " Would you please take out the trash." If we wrote " would you, please, take out the trash," it would be to indicate that impatience, as if to say Would you - and I'm asking this for the hundredth time - please take out the trash.
Yes like ''Hi,John" cause you pause a little when you say hi.
Only if it begins a new clause. We say I like everyone, including you. If there is no new clause, there should be no comma. We say This group is including you in its membership.
last comma before the and is not necessary
The phrase "Any update on this, please?" is grammatically correct. However, adding a comma after "this" would make it clearer and easier to read: "Any update on this, please?"
Yes, a comma should be used before the word "approximately" at the end of a sentence when it is used to indicate an estimation or rough calculation. The comma helps to separate the word "approximately" from the rest of the sentence and improves clarity for the reader.
It really depends on what the rest of the sentence is. For example, it is correct to say, "I don't know who will be there." In that case, there is no comma before "who". It is also correct to say, "My new neighbors, who have not spoken to me yet, keep letting their dog come into my yard and dig holes." That example does contain a comma before "who".
Not necessarily. There is no English word that requires a comma after it. Most commas go where you pause when speaking. We say Plus or minus twelve is the answer, with no pause. You probably mean it in the sense of additionally or also, however, as in Plus, you get a black eye! If you have to ask, you should know that plus is such a low choice of words to start a written sentence that the presence or absence of the comma doesn't really matter.
While I would not say that every use of the word anyway requires a comma, without exception, it is true that anyway often does call for a comma. Just remember, if you would pause slightly while speaking that sentence aloud, that is where a comma should go.
ka-ru-na Please note that this cannot be used by itself, but should be used in front of the request sentence, i.e. karuna <do this>, karuna <do that>.