could (do something) in (one's) sleep

Is able to do something with very little or no difficulty, or complete or accomplish something in a relaxed, carefree, or effortless manner. It took me a little while to get used to this job, but now I could do it in my sleep! You should ask Johnny for help—he could do this level of math in his sleep.See also: could, sleep

someone could do something in their sleep

someone could do or accomplish something with no effort or conscious thought. informalSee also: could, sleep, someone, something

单词	could (do something) in (one's) sleep
释义	could (do something) in (one's) sleep could (do something) in (one's) sleep Is able to do something with very little or no difficulty, or complete or accomplish something in a relaxed, carefree, or effortless manner. It took me a little while to get used to this job, but now I could do it in my sleep! You should ask Johnny for help—he could do this level of math in his sleep.See also: could, sleep someone could do something in their sleep someone could do or accomplish something with no effort or conscious thought. informalSee also: could, sleep, someone, something
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