他要是听了医生的建议，就不会病得这么重了。
Had he followed the doctor's advice, he would have avoided this illness.
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had英 /hæd/|美 /hæd/
followed英 /ˈfɒləʊd/|美 /ˈfɑloʊd/
would英 /wʊd/|美 /wʊd/
解释
'Had he followed...' = 倒装省略 if 的条件句。主句 'would have avoided' 表达与 past 相反的结果（如果听了就不会得这病）。
Had he followed the doctor's advice, he would have avoided this illness.
'Had he followed...' = 倒装省略 if 的条件句。主句 'would have avoided' 表达与 past 相反的结果（如果听了就不会得这病）。