Coffee prices rose sharply Monday, posting their biggest one-day gain in almost three years, after a weekend cold snap in Brazil raised concern that there could be damage to the world's largest crop when at a time with supplies already tight.
that there could be damage to the world's largest crop when at a time with supplies
that the world's largest crop could be damaged at a time such as when supplies are
that the world's largest crop could be damaged at a time when supplies are
of the world's largest crop possibly being damaged at a time with supplies
of possibly damaging the world's largest crop at a time that supplies were
我觉得不是在表达一般真理;主句could be, 状语从句are;这比较像if从句,事情还没有发生,做预测的语气
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