" Viola screamed at the top of her lungs when Beyoncé took the stage."
Viola is a card-carrying member of the BeyHive. That's a fact—and that's why screamed is an indicative verb in this example.
Did you know there are 17 different varieties of Mountain Dew? Our favorite is Passionfruit Frenzy, which you can only get in New Zealand.
" The roller hockey players scatter every time a car comes down the street."
Game off! Here, scatter is an indicative verb because this is an ordinary statement of fact. Game on again!
" Did you order the pizza yet? We're starving."
In this example, the verb phrase did order is part of a question, so we used the indicative mood. Ugh. Now we're hungry.