Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

Example input: How are i.e. and e.g. pronounced?
Example output: i.e. stands for id est (Latin), which means 'that is'. You use it to link in a deeper explanation about something. Pronounce it 'eye - ee'. e.g. stands for exempli gratia (also Latin), which means 'for example'. You use it to link in an example of a more generic term. Pronounce it 'ee - jee'
Example explanation: Perfect answer because it's consistent with context uses required information from the question to provide the detailed answer with an example.
Q: Possible Duplicate: How should I punctuate around quotes? When should end punctuation go inside quotes? Or is it region specific? I was always taught that when ending a quotation, that punctuation remains inside of the quote. I think he said, 'we should go to the store.' Are you sure he said, 'we should go to the store?' As opposed to: I think he said, 'we should go to the store'. Are you sure he said, 'we should go to the store'? This is just an arbitrary example off of the top of my head, and it's hard for me to come up with an example for the second usage because it looks completely wrong to me. I actually got into a small argument with my girlfriend earlier this year because she uses something similar to the second example, and said that's how she was taught (which is why I ask if it's region-specific.) Anyway, is there a correct usage for ending a quotation with punctuation?.
A:
In American English, commas and periods go inside the quotation marks. Semi-colons, question marks and exclamation marks go inside the quotation marks only if they're part of the quotation. E.g., 'What time is it?' he asked. Did he really say, 'I don't care'? So your example should be the following: I think he said, 'we should go to the store.' Are you sure he said, 'we should go to the store'?