These words all mean to rest with your eyes closed and your mind and body not active. 以上各词均含睡觉、入睡之义。

• sleep to rest with your eyes shut and your mind and body not active 指睡、睡觉、入睡：◆Did you sleep well? 你睡得好吗？◆I couldn't sleep last night. 我昨天晚上睡不着。 NOTE It is more usual to say that sb is asleep than that they are sleeping; but if you use an adverb to say how they are sleeping, use sleeping. 表示在睡觉，asleep 较 sleeping 常用，但如果用副词表示睡的状态就用 sleeping：◆'What's Ashley doing?' 'Sh! She's asleep.' “阿什利在干什么？” “嘘，她在睡觉。”◆The baby was sleeping peacefully. 婴儿睡得很安稳。◆The baby was asleep peacefully.
• doze to sleep lightly, waking up easily, often when you are not in bed 指打瞌睡、打盹儿，通常不是躺在床上：◆He was dozing in front of the TV. 他在电视机前打瞌睡。
• nap to sleep for a short time, especially during the day. 尤指日间的小睡、打盹儿
• snooze (informal) to sleep lightly for a short time, especially during the day and usually not in bed 尤指日间的小睡、打盹儿，通常不是躺在床上：◆My brother was snoozing on the sofa. 我弟弟正在沙发上打盹儿。

Patterns

• to sleep/doze lightly/fitfully
• to doze/snooze gently