The motorcyclist was lucky to survive the accident without a helmet, as he ________ a concussion or even worse.
a. may have sustained
b. could have sustained
c. can have sustained
d. would have sustained
에서 가정법이라는 건 알겠는데, b와 d의 차이가 뭐인가요?
a. may have sustained
b. could have sustained
c. can have sustained
d. would have sustained
에서 가정법이라는 건 알겠는데, b와 d의 차이가 뭐인가요?





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