1、which have increased five percent during the first three months of this year after fallingwhich 引導的定語(yǔ)從句用了現在完成時(shí),表示頭三個(gè)月增長(cháng)5%,還有可能繼續增長(cháng),很貼切.2、with a five percent increase during the first three months of this year after having fallen僅表示增長(cháng) 5%的概念,five percent 作前置定語(yǔ)是否要改成 five-percent?另外 after falling 和after having fallen 沒(méi)有多大區別,因為介詞 after 已經(jīng)表達了動(dòng)作的完成.。