.fall short of (=fail to reach a desired result, standard, etc.)沒達到，低于

　　.familiar with熟悉，了解

　　.have a fancy for (=like sth. without the help of reason)(沒有道理地)喜歡，想要

　　.take a fancy to (=become fond of)喜歡

　　.by far遠，非常(與比較級或級連用)

　　.far from遠遠不是

　　.far from非但不……(而且)

　　.in fashion (=stylish，most modern) 時興，流行

　　.after the fashion (of)依照……

　　.find fault with (=complain about;criticize)找毛病，對……吹毛求疵

　　.at fault (=in the wrong, blamable)有錯

　　.in favour of贊成

　　.be in favour with受寵，受偏愛;

　　out of favour with失寵，不受寵

　　.in one’s favour (=to one’s advantage)對……有利

　　.(be) favourable to (=advantageous)有利的

　　.fear for (=be afraid for the safety of sb. or sth.)為……擔心

　　.for fear of (=in case of; because of anxiety about)以防，由于怕