Variados

OR
To suggest that only one possibility can be realized, excluding one or the other: "You can study hard for this exam or you can fail."
To suggest the inclusive combination of alternatives: "Wecan broil chicken on the grill tonight, or we can just eat leftovers.
To suggest a refinement of the first clause: "Smith College is the premier all-women's college in the country, or so it seems tomost Smith College alumnae."
To suggest a restatement or "correction" of the first part of the sentence: "There are no rattlesnakes in this canyon, or so our guide tells us."
To suggest a negativecondition: "The New Hampshire state motto is the rather grim "Live free or die."
To suggest a negative alternative without the use of an imperative (see use of and above): "They must approve hispolitical style or they wouldn't keep electing him mayor."
AND
To suggest that one idea is chronologically sequential to another: "Tashonda sent in her applications and waited by the phone for aresponse."
To suggest that one idea is the result of another: "Willie heard the weather report and promptly boarded up his house."
To suggest that one idea is in contrast to another (frequently replaced bybut in this usage): "Juanita is brilliant and Shalimar has a pleasant personality.
To suggest an element of surprise (sometimes replaced by yet in this usage): "Hartford is a rich city and suffersfrom many symptoms of urban blight."
To suggest that one clause is dependent upon another, conditionally (usually the first clause is an imperative): "Use your credit cards frequently and you'll soonfind yourself deep in debt."
To suggest a kind of "comment" on the first clause: "Charlie became addicted to gambling — and that surprised no one who knew him."


BUT
To suggest a contrast that isunexpected in light of the first clause: "Joey lost a fortune in the stock market, but he still seems able to live quite comfortably."
To suggest in an affirmative sense what the first part of the...