# 1เลือกประเภทIf she (listen) to the teacher, she (not fail) the test.listens, won't faillistened, wouldn't failhad listened, wouldn’t have failedhad listen, wouldn't failed
# 3เลือกประเภทIf they (leave) earlier, they (not miss) the bus.had left, wouldn't have missedleft, won't missleave, won't have missedhad leave, wouldn't missed