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It should be ---Celebrate with you this fall
No, "fall" should not be capitalized unless it is used at the beginning of a sentence. It is a common noun, not a proper noun.
Yes, Fall 2011 should be capitalized because Fall refers to a specific season, and 2011 is a proper noun denoting a specific year.
At the beginning of a sentence and when it forms part of the proper noun. Examples: A Saturday's Fall No Place to Fall
He will attend Edison High School in the Fall.
Yes, seasons should be capitalized when they are used as proper nouns, such as "I love the colors of Fall." If they are used more generally, they should not be capitalized, as in "I enjoy the cooler weather in fall."
Yes, the season "Fall" should be capitalized when used in a sentence as it is a proper noun.
In most cases this is interpreted as referring to the planet. The planet Earth should always be capitalized. If you are referring to soil, earth does not need to be capitalized.
In a title, only capitalize the first word, proper nouns, and any other words that are typically capitalized (such as acronyms or the first word after a colon). So, "Be" and "Can" would not be capitalized unless they fall under these exceptions.
It would be more appropriate to capitalize the season name, so "Zevalin Fall 2008" would be correct.
Typically, yes.
Not usually. Unless the word starts a sentence or is adjoining a capitalized title. I'm assuming you're referring to the season "fall".
No, it should only be capitalized if it forms part of a title or is the beginning of a sentence.