Example: He WENT ON and ON talking and I was so bored.
Example: There are loads of people out in the street; what's GOING ON?
Meaning: Start doing or taking something
Example: She WENT ON the pill when she met him.
Meaning: Be guided
Example: The investigators have no clues to GO ON.
Meaning: Be nearly a certain period of time
Example: It's GOING ON ten years since we met.
Example: They asked me how the project was GOING ON.
Meaning: Spend money
Example: Most of my salary GOES ON my mortgage repayments.
Meaning: Start working (electric/electronic equipment)
Example: The alarm GOES ON when you close the front door.