地面很湿，昨天晚上一定下雨了。（表示对过去有把握的推测）

The ground is wet . It must have rained last night .

youdao

是对过去事情的肯定推测，意为：“肯定已经做了某事。”

The light is out. He must have gone to bed.

youdao

所有对未来表现的准确推测都基于对过去恩德相关表现的了解。

All informed predictions of future performance are based upon some knowledge of relevant past performance.

youdao

所有对未来表现的准确推测都基于对过去恩德相关表现的了解。

All informed predictions of future performance are based upon some knowledge of relevant past performance.

youdao