He smokes too much; perhaps that's why he can't get rid of his cough. A. If he didn't smoke so much, he may get rid of his cough. B. If he smoked less, he might be able to get rid of his co

If he didn't smoke so much, he may get rid of his cough.

If he smoked less, he might be able to get rid of his cough.

If he smoked less, he might be able to get rid of his cough.

If he does not smoke, he may not have his cough.