in the face of面对着
in ones face当着某人的面;face to faced面对面;face up to大胆面向
fail in 失败
in good faith 真诚地
keep faith with对守信用
lose faith in对失去信心
on faith毫无怀疑地，依赖地
faithful to 对忠诚
fall into the habit 养成习惯
fall short of 没达到，低于
familiar with熟悉，了解
have a fancy for 喜欢，想要
take a fancy to 喜欢
by far远，非常
far from远远不是
far from非但不
in fashion 时兴，流行
after the fashion 依照
find fault with 找毛病，对吹毛求疵
at fault 有错
in favour of赞成
be in favour with受宠，受偏爱;
out of favour with失宠，不受宠
in ones favour 对有利
favourable to 有利的
fear for 为担心
for fear of 以防，由于怕
in fear of 担心
feed on sth. 靠吃，用喂养
be fed up with 厌烦，腻了
feel like 想要
fill in填写
fill out 填写
set the world on fire = set the flames on fire 有突出成就
play with fire 干冒险事
set sth. on fire 使着火，放火
at first sight 乍一看，一见
for the first time第一次
in the first place首先，第一