:lol:
In others words:
You COULD tell the time by him because he always FINISHED work at exactly the same time every day. -> Past Tense
You CAN tell the time by him because he always FINISHES work at exactly the same time every day. -> Simple Present
Yankee
2
Hi Lucy
Welcome to the forum. 
Just out of curiosity, could you tell us (or me, at least ;)) which test you’re referring to in your post?
Amy