Which word to use when we ask for help? Some conditions: We know that the person asked is able to do it. We don't know if the person asked is able to do it.
Possible Duplicate: Can/May/Will you help me with this? Which is correct if I want to request for a pen? Can I have your pen please? May I have your pen please?
I'm a native English speaker and I've been doing some research into English grammar for a programme I'm working on. However, on looking into modal verbs, I've only just come to appreciate how subtle ...