fast asleep/sound asleep

fast asleep/sound asleep sound asleep怎么用 高中英语sound asleep用法 fast fall asleep/ fall fast asleep 哪个对? 英语词组解释1.BE SOUND ASLEEP2.BE WIDE AWAKE3.FALL FAST ASLEEP讲讲它们 As they were all fast asleep,neither of them heard the sound fall sound asleep,fall soundly asleep 哪个对啊 为什么是be fast asleep 而不是be fastly asleep? She was fast asleep.She was _____ asleep be fast asleep与fall asleep的区别. be fast asleep和 be wide awake asleep sleepy fall asleep feel asleep 区别