I need to spend hours studying this weekend for my exams; ergo, I will not be attending the game.
My electric bill is way too high; ergo, I will stop leaving the lights on when I am not in the room.
Sarah had learned how to parallel park perfectly, ergo, she had great hopes of passing her driving test.
Eva wanted to stay away from her family for a few hours; ergo, she went out for dinner with friends.
There's a high pollen count today, ergo, I will not be going outside because my seasonal allergies have flared up.
I left the meeting a few minutes early; ergo, I don't know what the plans are for the next event.