face up to勇敢地对付/大胆面向
fail in在…不足/疏忽
fail to不能/记忆
fall back on求助于/转而依靠
fall behind落在…后面/跟不上
fall for爱上/迷恋/受骗
fall in love爱上某人
fall in love with相爱/爱上…
fall in with偶尔遇到/同意/赞许
fall into落入/陷于/河流注入
fall on one's knees跪下(请求等)
fall out争吵/闹翻/结果
fall out of放弃(习惯等)
fall through失败/成为泡影
fall to着手/开始攻击
fall under受到(影响等)/被列为
far and away大大…/无疑地
far and near远近/到处/四面八方
far from远离/决不/完全不
fear for为…担心
feed on以…为食物(能源)
feed up供给…营养
feed with加上(油、煤等)
feel amused at以…自娱/逗…笑
feel like感到想要做
feel out试探出/摸清
feel up to觉得能担当
figure on把…估计在内/指望
figure out计算出/估计/理解
figure up计算…/把…总加起来
fill in填充/填写/临时代替
fill out填好/填写/使长大
fill up填补/装满
find expression in在…中表现出来
find oneself发觉自己的处境
find out查明/找到/发现
finish up结束/完成
finish up with以…结束/最后有…
finish with完成/结束
fire up(突然)生气/勃然大怒
first and foremost首要地/首先
first of all首先/第一
first or last(古)迟早/早晚
fish out捞出/把…中的鱼捕尽
fix one's eyes on注意/注视
fix up修补/修理好/解决
flame out突然冒火焰
flare up突然烧起来/突然发怒
flash out突然说/突然表现出来
fly into a temper大发脾气勃然大怒
focus...on使眼睛注视/集中
follow out贯彻/把…探究到底
follow through坚持到底
follow up穷追(猎物等)
for ages长期
for certain肯定地/确凿地
for ever永远
for example例如
for fear of由于害怕/生怕/以免
for good永久地/一劳永逸地
for instance例如/比如/举例说
for lack of因缺乏/因没有
for life终身
for sale待售/出售的
for sure确实/毫无疑问地
for the best(完全)出于好意
for the better好转/向好的方向发展
for the future从今以后/在今后
for the moment暂时/目前
for the present目前/暂时/暂且
for the rest至于其余/至于其它
for the sake of为了/为了…的利益
for the time being暂时/眼下
for what it is worth不论真假
forget about忘记
free and easy不拘形式的/随便的
free from不受…影响的
free of无…的/摆脱了…的
freeze up(使)冻结
from memory凭记忆
from now on今后/从现在起
from time to time时常/有时/不时
