may not 与 be possibly not 的区别

Drugs are possibly not as safe as previously thought.

Drugs may not be as safe as previously thought.

请问老师，这两个句子是否存在差别？

二个句子意义相同，但结构不同。一个用副词表示情态意义——可能性，一个用情态动词表示推测——可能。还可以用形容词likely, possiple表示这种意义：

It is likely/possible that drugs are not as safe as previously thought.

曹荣禄 -

擅长：动词用法,句法问题 | 采纳率 82% | 回答于 1秒前

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