I think what you are talking about is called "PUN",not "ambiguous".
Oh BTW,it's "ambiguous"
And~Here you go:
有一次老師問學(xué)生:Which runs faster,heat or cold?有的同學(xué)認(rèn)為heat跑得快,有的則說冬天的冷空氣來得迅猛,各持己見,難分難解.后來,老師笑著說:Heat runs faster,because you can easily catch cold.“冷”是一種氣流,怎么能抓得住呢?直到老師把句子寫到黑板上后,同學(xué)們才恍然大悟.原來catch cold是“感冒”的意思.人們常會catch cold,而從未聽說過有人catch heat.既然“抓不住heat”,不言而喻heat比cold跑得快了.同音異意或一詞多義的詼諧的詞或句子,就是“雙關(guān)謎語”pun.
大部分puns是文字游戲,其中有同音同形而異意的puns,例如：
——What trees has fire no effect upon?
——Ashes,when burnt,they are still ashes.
Ash在英語里既是“木岑樹”,又是“灰燼”,不管怎么燒,ash（木岑樹）仍然是ash（灰）.
——Why many carpenters reasonably believe there is no such thing as stone?
——Because they never saw one.
saw是see的過去時(shí),又可作“鋸”解,木匠當(dāng)然不會去鋸石頭.
——What flower does everyone have?
——Tulips.
tulips['tju:lips],郁金香,發(fā)音相當(dāng)于人的“兩瓣嘴唇”two lips.
——What trees come in two's?
——Pear trees.
pear梨子,發(fā)音同“一對”的pair相同.
還有一些用“成語”（idioms）構(gòu)成的puns,例如：
——Why is a dog biting his tail like a good manager?
——Because he makes both ends meet.
make both ends meet是狗咬尾巴時(shí)首尾相觸的動作,而這一短語又可作“收支平衡”的成語,能做到收支平衡當(dāng)然是個(gè)好管家.
——Why is crow the bravest bird in the world?
——Because it never shows the white feather.
crow烏鴉沒有白羽毛,但是show the white feather又是一個(gè)意為“膽怯”的成語.
英語的puns很多,不全是文字游戲,有的是很辛辣的諷刺.例如：
——Why is a restless man in bed like a lawyer?
——Because he lies on one side then turns around and lies on the other.
有心事的人總是躺在床上翻來覆去睡不著,可是lie又可作“撒謊”.