felt: past tense and past participle of the verb 'to feel'

　　felt：feel的过去式和过去分词形式。

　　Examples:

　　例句：

　　I felt better after I had a good dinner.

　　He hasn't felt this well for a long time.

　　美餐一顿之后我感觉好多了。

　　他很久没有感觉这么好了。

　　fell: past tense of the verb 'to fall'

　　fell：fall的过去式和过去分词形式。

　　Examples:

　　例句：

　　He fell from a tree and broke his leg.

　　Unfortunately, I fell down and hurt myself.

　　他从一棵树上掉了下来摔断了腿。

　　不幸的是，我摔倒了伤到了我自己。