Raise preflop, bet the flop, now what?

[Spicymoose]

This situation comes up so often for me, and I am so confused as to what to do. Please help. I'll give a few examples.

1. Hero is BB with AQs. 3 limpers, SB folds, Hero raises. Flop comes 279r. Hero bets, 3 callers. Turn is a 5. Now what?

2. Same as before, but now we have 2 callers.

3. 3 callers on a flop of 2c8c9d, we have none of the suits.

4. same as before, but now 2 callers.

5. 3 callers on a flop of 2c8c9d, we have AdQd.

6. same as before, but 2 callers.

Thanks for the help. For each of the situations, please tell me if its definetly a bet, definetly a check, or if it is really close and could swing either way depending on other circumstances.

Spicymoose