sleepy是sleep 的形容詞形態(tài),作表語,意為“瞌睡的、困倦的”;作前置定語,意為“寂靜的”;asleep是形容詞,是表語形容詞,只能做表語,意思是：睡著的。sleeping是形容詞,意思是：睡著的,不一定用做標(biāo)語,可以用做定語,另外它還是個(gè)動(dòng)名詞。

sleep n. / v. 睡覺,睡眠sleepy a. 困的，想睡覺的sleeping a.正在睡覺的asleep a.睡著的，睡熟的sleep 做動(dòng)詞或名詞：sleep a sound sleep睡得極甜sleep睡眠violate sleep阻礙睡眠sleep double(二人)合睡一鋪sleep disorders睡眠障礙sleep disorder睡眠障礙orthodox sleep【醫(yī)】無夢睡眠frozen sleep【醫(yī)】冷眠療法;超低體溫fox's sleep假睡;假裝的electric sleep電麻醉做形容詞：fall asleep入睡sound asleep.酣睡pretend to be asleep假裝睡覺fast asleep.睡得很熟fall asleep over one's work工作時(shí)睡著了charm sb.asleep(用魔法)對某人施催眠術(shù)The sea is asleep.海上風(fēng)平浪靜。The baby fell asleep.那孩子睡著了。Soon they fell asleep.他們很快就睡著了。My leg is asleep.我的腿麻木了做形容詞：sleepy.想睡的a sleepy village寂靜的村莊an overripe sleepy pear過熟而開始腐爛的梨a sleepy little village靜寂無生氣的小村a sleepy rural town.肅靜的鄉(xiāng)間城鎮(zhèn)I was deadly sleepy.我困極了。I feel very sleepy.我覺得很困。I am still sleepy.我還想睡。The condition of being sleepy.處于困倦的狀態(tài)I felt sleepy all day.

來源：高三網(wǎng)