Use an "s" without an apostrophe after the year to indicate spans of decades or centuries. 1900s is the period from 1900 to 1999. An apostrophe after the year is needed for possessives. Example: The presidential election was 1980's

This site might help you on the rules of apostrophe. Fairly comprehensive: http://www.grammarbook.com/punctuation/apostro.asp

one month's time two months' time

Use the apostrophe. I've also seen it as New Year Eve without the possessive at all, as in Christmas Eve.

I never use an apostrophe with these abbreviations, unless it would cause confusion without the apostrophe, e.g. when the abbreviation is a combination of uppercase and lowercase letters. So the following plural forms look OK to me: CDs, DVDs,

Hi ccrellin, and welcome to English Forums, Another one that always confuses me is "its" as in "it doubled its capacity to seat 20,000". Normally with nouns we indicate belonging with an apostrophe, for example "the

Hi Alc As long as you add a comma and an apostrophe to your new sentence, I think you could say that.

Hi All, I think that the reason people get this wrong (i.e. "cd's") is because they think in terms of abbreviation just as "phone" should really be written " 'phone" to indicate the missing "tele".

When you are using an apostrophe to stand in for a dropped letter in dialogue, let nothing separate it from the preceding letter. It's free fer the askin'. Bobbie-Jo complained, "She took my new yeller blouse without even

1)Apostrophe on "dogs". Multiply the age of your dog by 7. 2)I get dizzy reading it. Someone may come along to help. 3) Chose the wrong word which is the reason .. 4) I believed it was answered previously. 5) Logically makes