1.句中的teach a fish to swim是一個英語習語。遊泳是魚兒天生的本能，完全适應水底生活，如果有人想教魚兒to swim，就顯得“沒有必要”，或"不明智"，或"自不量力"。英語中類似的表達還有：teach a dog to chase rabbits；show the President where the White House is；teach the Pope how to pray；use Chinese maxims in front of Confucius.#在頭條看見彼此#
2.本句是一個祈使句，表達強烈的否定。offer作為及物動詞時意為“（主動）提供；給予”，常有“offer sth.to sb./offer to do sth."等結構。後跟動詞時，要用動詞不定式作賓語。如：They decided to offer the job to Mike./The kids offered to wash the dishes after supper.#頭條小組成長記#
