Reading: Inversion in Conditional Sentences
Had I known about the traffic jam, I would have left earlier. Were I in her position, I would have acted differently. Should you need assistance, please contact the office. If he had prepared better, he would have succeeded. Not only would I agree with that idea, but I would also contribute actively. Rarely do we find such opportunities in life. Only if she apologizes will I consider forgiving her. Had they informed us earlier, we could have prevented the problem.