could
　　[助动词] 能, 会, 可能会, 可以. (can 的过去式)
　　I was so tired that I could not do my homework.
　　我太累了以致於没办法做 (我的) 家庭作业.
　　It could be weeks before we know the real story of this event.
　　可能要过好几个星期我们才能瞭解这个事件的真相.
　　
 
　　eat
　　[动　词] 吃(东西), 喝, 进食, 用膳.
　　I can not eat any more.
　　我吃不下了.
　　I am so hungry that I could eat a horse.
　　我饿得可以吃下一匹马. [用来形容非常飢饿]
　　
 
　　eaten
　　[动　词] 吃(东西), 喝, 进食, 用膳. (eat 的过去分词)
　　I have not eaten lunch yet.
　　我还没有吃午餐.
　　It is said that the little boy has been eaten by a tiger.
　　据说那个小男孩被一隻老虎吃掉了.
　　
 
　　eight
　　[名　词] 八, 八个.
　　At the age of eight, she began to learn English.
　　她在八岁时开始学英文.
　　[形容词] 八的, 八个的.
　　Please come here before eight o'clock.
　　请在八点 (鐘) 之前到这裡.
　　
 
　　eighteen
　　[名　词] 十八, 十八个.
　　Two times nine is eighteen.
　　二乘九是十八.
　　[形容词] 十八的, 十八个的.
　　There are eighteen students in the classroom.
　　这教室裡有十八个学生.
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