# 1ปรนัยIf she (1) (study) harder, she (2) (pass) the exam.had studied / would passstudied / would have passedhad studied / would have passedhas studied / would have passed
# 2ปรนัยIf we (1) (leave) earlier, we (2) (catch) the train.leave / would have caught had left / would catchleft / would have caughthad left / would have caught
# 3จริง/เท็จIf you'd bought those jeans in the sale, they had been much cheaper. Is this sentence correct?
# 4จริง/เท็จLeo would have got into debt if he didn't play back the money so quickly. Is this sentence correct