然もなければ

He studied hard; otherwise he would have failed again

We started at once, otherwise we would have missed him

Furthermore, experiments were never carried out against the rules but were performed always well within them - otherwise they would not be recognized as experiments at all

He left early; otherwise he could not have caught the train

I had a high fever; otherwise I could have gone camping

Start at once, or you will be late

I went at once; otherwise I should have missed him

We must leave the hotel before 10 a.m., otherwise we will miss the train for Miami

Make haste, or you will be late

They lost their way; otherwise, they would have arrived long ago

Otherwise he would not have won the first prize

He did his best; otherwise he would not have won the first prize

We've got to break out tonight or I'll go crazy