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
This sentence describes concern about a potential problem, which is
appropriately expressed in subjunctive mood (could be damaged).
C. Correct. This sentence correctly uses the subjunctive mood to express a //potential problem//, and the idiom// at a time when// is correct.
AB选项:固定搭配有误:at a time when 表将来;DE选项concern of此搭配有误,同时,being, damaging现在分词形式有问题;至于C选项的时态,表达一般的规律
整个句子都是过去式的,C选项的are难道不应该换成were吗?求大神帮忙解答一下
应该是指一种general idea吧 一种一直存在的道理
The usage of are (present tense) conveys that RIGHT NOW -- just a few days after prices rose this past Monday -- supplies ARE tight.
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