Sentence: "At thirteen, fourteen, and fifteen years old " ...need hyphen between 'fifteen' and 'years' ?
828540
In your sentence, no hyphen is required.  You only use it as an adjective or noun, and it would also be carried, as in:\n\nThe fourteen- and fifteen-year-olds get along fine with the twelve- and thirteen-year-old girls.
820411
the sentence doesn't make sense...It has to be: My dog, Spot, lives for five years and then........-----or My dog, Spot, lived for 5 years..---the problem with the sentence is with it's tense...you can't live for 5 years in the current tense.
352012
Use "have" or "has" if you're looking back at something in the past, which is referring to something further in the past and continued past one event.\n\nI like ice cream.  <-- now\nI liked ice cream yesterday, too.  <-- one event\nI have liked ice cream for a long time.  <-- happened many times in the past\n\nShe begins her homework after dinner most of the time.  <-- now\nShe began her homework late yesterday.  <-- one event\nShe has begun her homework late too many times for her mother to overlook it anymore.  <-- happened many times in the past\n\nI sing this song as much as I can.  <-- now\nI sang it thirty-two times yesterday.  <-- one time (yesterday)\nI have sung it so often by now that I even hear it in my sleep.  <-- happened often in the past
1162976
Passed would be used to describe movement of some sort. Past would be used in reference to time. Examples...\n\nI passed you on the highway this morning.\n\nIn the past, I've seen you on the highway.\n\nIn your sentence, it should be rewritten as "I graduated XYZ college in 2002." Because neither passed or past would be appropriate. Unless you are stating you passed out due to excessive drinking. :) However, if you are just wondering which would be correct, past or passed, in just the context of your sentence and the information you want to construe and not the proper grammar, than passed would be correct because you obviously received passing grades, passed your exams. :)
575913
Old enough to know when to use "is" and when to use "are".
968213
I am in my fourth year of University Honouring in English. The correct MLA way is "I am not going"(35). The source comes at the end of a sentence. Ex: Bob said that he is "not going" to the dance illustrates his unwillingness to participate in social gatherings (35). There is a space between the sentence and the source if the quote is not the last thing in the line. If the source immediately follows the quote there is no space. "I am not going"(35). Good luck!
432522
for starters, a few corrections...\n"i have worked there for four years" is poor grammar.\ninstead, it should be "i worked there for four years."\nand that's past tense... not present tense, and certainly not present perfect.\n\npresent perfect - action happened at an unspecified time before now... the exact time is not important.\nexamples:\n\ni have been to the mall.\nhe has never been on an airplane.\nmy math scores have improved since i started studying.\nman has walked on the moon.\nit hasn't stopped raining yet.\nshe has discussed her problem with many people.\n\npresent perfect continuous - something started in the past and continues up to now.\nexamples:\n\ni have been waiting for twenty minutes.\nshe has been working there since july.\nhe has been feeling depressed lately.\ni have had my car for two years.\nlately, i have been doing all of the work.
767465
I had taken algebra. Past tense.\nI ran versions of both sentence structures thru Microsoft Words grammar checker, and it didn't flag either one.
890838
Before, after, and between
734271
I see one run on sentence that needs to be split. I also see two others that should be combined into one\n\nThat said, a good writer never pads the piece. The whole idea is to make it as clear & concise as possible. As a writer, the only legitimate way to extend this is to add information.\n\nI just did a search & on the first page I opened & found the answer to your problems - with an "s".. Your info or the web page info is incorrect, one or the other  There was enough other info to expand the reason for the tie.\n\nAfter a quick search, I found additional info & an error you may wish to correct.       This is a much better version than the 3 sentences I wrote earlier, correct? That is what I mean by clear & concise.\n \nYou've done all right so far. just a little more..
282405
A.sentence 1 is the topic sentence.
768505
1. u put the semicolons after Oregon and California\n2. it's they're instead of their and its Scobee's an also their's should be theirs\n3. Quotation before Upon and after the ?\n4. " after the period is all i could see wrong
479120
yes, the punctuation is correct, however the sentence is very informal, so if it is for an essay I'd change it to make it more formal.
187718
It is my experience, especially now that I'm a teacher, that when you're young you want to be/look older.  When you're older, you want to be/look younger.  Enjoy your youth because it only happens once.
985881
1) D --none of the others are complex, only have prepositional phrases\n2) A- this is iffy, but B is compound, not complex. C is simple. D is compound.\n3) C- the other choices are all complex sentences.
691302
A would be the best answer.  Starting the sentences with the same noun is too repetitive.
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.