n. 哈欠vi. 打哈欠, 裂开vt. 打着哈欠说相关词组: with a yawn

◆记忆方法一：
分析：ya——“鸭”的拼音；wn——“无奈”的拼音首字母。
记忆：鸭子无奈地打着呵欠。

◆记忆方法二：
联想方式：ya-（鸭）；wn-（畏难）
记忆方法：鸭畏难时，常常打哈欠

sleeve/slice/slide/slim/slip/sleep/yawn/hibernate
记忆：
1. sleeve [ sli:v ] A part of a garment that covers all or part of an arm. n. 袖子 It seems that they have the match up their sleeves. 好象他们对比赛胸有成竹。
2. slice [ slais ] n. 薄片, 切片 The waitress served a plate of sliced meat to us. 女服务员给我们端来了一盘肉片。
3. slide [ slaid ] v. (使)滑动n. 滑, 幻灯片 The boy slid past the door without anyone noticing. 男孩溜出了门，没有人注意到他。
4. slim [ slim ] m, 苗，苗条； adj. 苗条的, 纤细的 The fashion model had a very slim figure. 时装模特身段非常苗条。
5. slip [ slip ] n. 滑倒, 事故, 片, 纸片 vi. 滑动, 滑倒, 失足 She slipped on the shiny floor and fell. 她在亮晶晶的地板上滑倒了。
6. sleep [ sli:p ] vi. 睡, 睡觉 n. 睡眠 I need a good sleep badly. 我非常需要好好睡一觉。
7. sleepy [ 5sli:pi ] adj. 想睡的 His sleepy eyes suggested that he didn’t sleep well last night. 他惺松的眼睛表明他昨夜没有睡好。
8. yawn [ jC:n ] vi. 打呵欠, 张开, 裂开 He closed the book, yawned, and went to bed. 他关上书，打了个呵欠，上床睡了。
7. hibernate [ 5haibEneit ] vi. 冬眠 Cold-blooded animals often hibernate in winter. 冷血动物常会冬眠。
另类阅读：
The slim girl was sleepy. She yawned and slid into the kitchen. She rolled up her sleeve and picked up a slice of meat with her slim fingers. Then she slipped away and went to sleep again as if to hibernate.