imagination 含义广，一般不含贬义。可指认真、带有启发性的想象，也可指凭记忆的想象或凭空想象事物的能力。
fancy 指脱离实际的幻想或幻想力，常暗含所想象的东西近乎怪诞的意味。
fantasy 指与现实完全脱节，荒诞离谱、稀奇古怪的想象。
参考例句
1. Can you fancy him in uniform? 你能想像一下他穿制服的样子吗?
2. Both of them like fancy clothes. 他俩都喜欢别致的服装。
3. Fancy her writing a letter like that! 真想不到她写了那样一封信。
英英解释
n.
1. something many people believe that is false
2. a kind of imagination that was held by Coleridge to be more casual and superficial than true imagina
3. a predisposition to like something v.
1. imagine; conceive of; see in one's mind
2. have a fancy or particular liking or desire for adj.
1. not plain; decorative or ornamented
