face to face 面对面地
face up to 大胆面向
in the face of 面对,在…面前;不顾,即使
make a face 做鬼脸
in fact 其实,实际上
matter of fact 实际情况,真相
fail to 未能
fall behind 落后
fall back on 求助于,转而依靠
fall in with 符合,与…一致;碰见
fall out 争吵,结果是
fall through 落空,失败
as far as/so far as 远至,到…程度
by far …得多,最
far from 远非,远离
so far 迄今为止
find fault 埋怨,挑剔
in favor of 有利于,便于,赞成,支持
feed in 输入
be fed up (with) 感到厌烦
feel like 欲,想要
a few 有些,几个
quite a few 还不少,有相当数目的
fill in/out 填充,填写
find out 查明
catch fire 着火
set fire to 点燃
on fire 烧着
at first 最初,首先
first and foremost 首要的，首先
first of all 首先,第一
flare up 突然燃起来;突然发怒
as follows 如下
make a fool of 玩弄,愚弄
on foot 步行
in force 有效,实施中
come/go into force 生效,实施
and so forth 等等
set free 释放
make friends 交朋友,友好相处
be friends with 对…友好,与…交上朋友
to and fro 来来回回
in front of 在…面前
make fun of 取笑,嘲弄
make a fuss of 娇养(某人),过分关怀(某人)
in (the) future 今后,将来