6
votes
4answers
9k views

Is either “can” or “could” more polite? [duplicate]

Possible Duplicate: When do I use “can” or “could”? I wonder which of the following is more polite: Can you please change my email address? Could you please change my email ...
31
votes
6answers
44k views

When do I use “can” or “could”?

When should I use can? When should I use could? What is right under what context?