The Time Travel Agency is investigating a massive timeline violation. A rookie time traveler went back to the Jurassic period and accidentally stepped on a prehistoric bug, altering history!
Select ALL the grammatically correct statements that belong in the Agency's official report.
The correct answers are If the traveler hadn't stepped on that bug, the timeline wouldn't have changed. and History might have remained the same if he had watched his step.
The third conditional can use different modal verbs in the main clause (such as would, could, or might) to express certainty or possibility about the hypothetical past result.
The if-clause must use the past perfect (had/hadn't stepped), not would have or the present tense (watches).