Meanings

1. particle indicating that a previously asked question is to be applied to the preceding word ('What about ...?', 'And ...?')
2. particle for inquiring about location ('Where is ...?')
3. particle signaling a pause, to emphasize the preceding words and allow the listener time to take them on board ('ok?', 'are you with me?')
4. (at the end of a declarative sentence) particle indicating continuation of a state or action
5. particle indicating strong affirmation