"People" is the usual plural of "person." However, you can say "persons" to emphasize the individuals. So... 3,908,000 live in Guadalajara. But I spoke to only three persons that night: the cab driver, the wino, and the ballerina. In the second example you could also say "people."
Special circumstance: The police keep files on missing persons (not missing people).
No, it is not. It is "several persons"
yes
In strict English grammar, the correct thing to say is "it is I." It is me is just more common usage.
No, The correct grammar for this sentence would be, "He finished doing his homework."
That grammar is perfectly correct.
Yes, it is correct grammar to say "Would you be so kind as to [do something]?" It is considered somewhat formal.
"When is the best time I can call you?" is correct.
No.It is supposed to be several persons.
It is not correct to say "they has studied". The correct way is to say "they have studied." There are many different places that a person can check grammar questions such as English grammar websites.
the grammar is correct. i think.
Yes, that is correct grammar.
Yes, 'you were correct' is perfect grammar. An example sentence: You were correct when you said that a tomato is a fruit.
This should say, The next stop will be somewhere in Vasayas, then it will be correct grammar. Written as it is it is not on correct grammar.
No, it is not correct
No, "Is was able to confirmed" is not correct grammar. The correct phrase would be "It was able to be confirmed."
PROGRAMER Or: programmer. Using the correct spelling (so tempted to say grammar).
In strict English grammar, the correct thing to say is "it is I." It is me is just more common usage.
No, The correct grammar for this sentence would be, "He finished doing his homework."
Yes