If you before, you the exam.（要是你以前努力学习了，考试就通过了）
A: had studied; would have passed
B: studies, will pass
A: had studied; would have passed
B: studies, will pass
举一反三
- 如果你以前好好学习， 你会通过考试的。（过去虚拟）If you study hard before, you would have passed the exam.
- Only when you have acquired a good knowledge of the field, . A: you can pass the exam B: you passed the exam C: can you pass the exam D: you will pass the exam
- Tom studied very hard he passed the exam.（汤姆努力学习，结果通过了考试） A: so that B: because
- _______, he would have been able to pass the exam. A: If he studies more B: If he had studied more C: Studying more D: If he had studying more
- You _____ the exam, but you spent all your time playing. A: can pass B: could have passed C: could pass D: can have passed