the article and plural?
971290
Yes, emails is correct plural form of email.  Most nouns can be made plural by adding either 's' or 'es'....  there are other rules such as if your original word ends in 'y', drop the 'y' and add 'ies'..... and of course for every "RULE" in English,..... we have one or more exceptions.\n\nNote:  some nouns change form when pluralized:\neg: person / people  ( :-)) - although, just to further confuse things,..... 'persons' is also a technically correct term in certain instances)
900160
Because it is plural.  In spanish if you abbreviate something in plural you double the initial.
290387
As a continuous noun (rather than a discrete noun), there is no plural for feedback.\n\nThe general rule is that unless you can say you have 1 whatever, it doesn't take a plural.
754293
"Editing this article is very easy."\n\nWithin the clause "Editing this article," the word "Editing" behaves as a verb; in particular the phrase "this article" is the object of that verb. But the whole clause "Editing this article" acts as a noun within the sentence as a whole; it is the subject of the verb "is".\n\nhttp://en.wikipedia.org/wiki/Gerund\n\n\nJumping up and down will not get you an answer any faster.  Jumping up and down.  \n\nSee how, if you replace it with another noun will still make sense?  Like:  Money will not...\n\nIt's different from a participle phrase in how it's used.  A gerund is used as a noun; a participle used as an adjective.
1169850
Well, <are> and <is> are verbs (different forms of the same verb actually), and <of> is a preposition...\n\nAnd that would be their "category"
316077
Person is singular\npeople is plural
896262
Grammatically, they're both correct.\n\nIf you're using this sentence in some kind of composition, your biggest problem is that the sentence has an inconsistent tone. The middle of the sentence has the sophisticated "atypical dialects," while the beginning and end are much more conversational and less descriptive.\n\nBut if you're asking me to pick, I would say the second.
696629
"There is a few...?" is incorrect because when you are saying "few" you are talking about more than one and "are" is the correct linking verb for more than one. "is" means /one/ thing.
320868
the first is plural, the second singular.
666774
D.\n\nA is incorrect because it's supposed to be plural (womens')\nB is plural\nC is incorrect as "whose" is the possessive.
691302
A would be the best answer.  Starting the sentences with the same noun is too repetitive.
681921
I think as you continue to study English, you will find that the rules in the grammar books don't cover all situations.  Linguists (the people who write the textbooks) don't completely understand the meanings of articles, so it is very hard to teach something that we don't understand to students.\n\nIn this case, your teacher is right, but keep trying!  I encourage you to read as much as you can in English.  This is possibly one way that you can use to learn about articles.\n\nHere is a rule that I think is helpful to students when they are working with singular count nouns:\nIf the person you are talking to knows exactly which thing you are talking about, use "the".\nIf the person you are talking to doesn't know exactly which thing you are talking about, use "a".\n\nIn this case, then, since the person you are talking to doesn't know EXACTLY which tree you are talking about, "a" is more appropriate than "the".  (However, frankly, in this case, I think native speakers would say 'They are both grown on trees'.)
159863
"Are" is plural for the first and third person ("we are," "they are") and is also singular in the second person ("you are"). "Is" is always singular, and is used for the third person only ("it is").
630476
Grammatically they are both correct.  #2 sounds more natural.  My only source is my Sprachgefühl (feel for language)
895592
These look like short "essay" questions, not an article.  We could better help if we knew the questions your responses attempt to answer.\n\nIf you are not answering specific questions, you need to do a bit of work in order for your article to make sense.  \n\nGive us more info so we can help!
365278
yes, both are correct.\n\nthey do have a different meaning though.\n\nOne ("the") gives the impression that your are comparing two airplanes, and one is more safer than the other.\n\nTwo ("a") gives the impression that you have identified one airplane, and you want to take any airplane which is safer than the one you have identified.
208000
making it plural by adding "s" or "es"