what does it mean when one sees 2 hyphens in a sentence?
138579
Properly, those would be dashes, not hyphens.  Let's take this sample sentence:\n\n"The stories from the last century — perseverance, rape, poverty, humor, ingenuity — are each worth a novel."\n\nThe dashes set off a portion of the sentence that explains or amplifies what the sentence is about: "stories", in this case.\n\nIt's similar to the use of dashes in this sentence:\n\n"The four Beatles — John, Paul, George, Ringo — had a great influence on pop music in the 1960's and 1970's."\n\nFor more information, consult the reference linked below, or try a Google search:
117480
2 questions but 3 question marks
954626
It is capable of different meanings according to the perception of the answerer. Please make your question more specific.
553542
I see an A and a G, actually.   :)\n\nThose sentences are called "pangrams" and here's a cool link for more info on them!
63783
When writing, an apostrophe is used to show possession, for abreviations, contractions, and also a few plurals.  I think this is what you were after.  If not, sorry.
813887
The rule is that when you're writing numbers you may use a hyphen after the tens place as necessary. And you only do it then if there is something IN the tens space to begin with, and something other than zero in the ones space.  'One hundred twenty-two', 'seventy-four' and 'five hunded thousand four hundred fifty-two' are examples. Also, if the numbers are below twenty, you won't hyphenate, as they names of the numbers are all one word in that case,ie one hundred twelve. Remember that you never use the word "and" unless you have encountered a decimal or fraction. I know you didn't ask that, but it seemed relevant. So, it's not one hundred and twelve, but one hundred twelve. Not two hundred and thirty-four, but two hundred thirty-four:)
387254
Not quite... It's generally understandable though. \n\nIf you're meaning... \n\n"I'm afraid my English is not good enough to understand the important rules that you are going to say."\n\nI'm is I am, which, in some circles is more common, and readable, but of little importance grammatically.\n\nThe important point is with the word "miss". In this incident having miss instead of understand makes the meaning of the sentence change dramatically. \n\nWritten as you did, it basically means that if you understand English well, you won't be able to understand... \n\nThis is non-sensible, and self contradictory, so it leaves the reader with the option of understanding it despite its poor grammar. \n\nAmericans often make similar mistakes themselves and, perhaps unconsciously, compensate, as many of those who have answered before me have done.\n\nI seperated the above into extra paragraphs to make it more readable, and hopefully easier to understand. Normal English obviously does not use such segmented paragraphing.
357088
Don't you know?\nDid you get the grammar wrong (if so congrats)\nIs this code for something?
1169943
a dash is -- (two marks) it is often confused with a hyphen but a hyphen is "-" (only one mark)\n\ncheck here for other typography's\n\nhttp://en.wikipedia.org/wiki/Dash\n\ncheck ya later♥
829673
I think you'd have to put it in context to get a decent answer (at least from someone who hasn't read the article to which you refer).  It could mean any number of things depending on the sentences that preceded or followed it.
656462
The two basic parts to a sentence are the subject and the predicate.\n\nA subject tells who or what the sentence is mostly about (noun or pronoun).\nThe predicate shows action or a state of being (verb).\nA sentence also requires a complete thought.\n\nYour examples all contain two complete thoughts, but only one of them is joined correctly (with a comma and a conjunction) as a compound sentence. (You also need to add a period.)
1106744
I think  there is a rule about the a/an coming right before the h where you use the second letter. If the second letter is a vowel, than you use 'an', otherwise, an 'a'.
647749
The first one is correct.\n\nThe second would be correct if you changed the is to has.\n\nHTH
219215
If it's a compount sentance...\n\nExample:\n\nI'll run for help, you get the fire hose!\n\nThe subjects are 'I' and 'you' with an implied 'and' conjunction (but not really).  The compound predicates are 'run' and 'get'...   So... there you go.\n\nThis isn't two sentences, it's a compound sentece.  (I guess the case could be made that it should be two sentences.)  Keep in mind that I was trying to make a compound sentence with two non-conjunctionated (like my made up word?) subjects.  Really you would say soemthing like "Go get help and I'll grab the hose" which WOULD have a conjunction.
66520
"Grammar"\n\nIn the second half of your continueing sentence you are referring back to the first half when it should be treated as two seperate sentences at a minimum.
126338
Laziness..spell-checker and the internet... Enough said....\nIt's a pet-peave of mine too.. I don't expect perfect grammar, but I at least want to be able to understand what one is saying to me...I'm not a perfectionist, but let's get real...Nobody takes you seriously if you can't tell the difference between to, two and too...Geez! DRIVES ME CRAZY!!
122874
it does mean "reveal" - but unsure if it is plural