LOOK:
look after照顾
look the same看起来一样
look at 看
look for 寻找
look out 小心
look up 查字典/向上看
look a gift horse in the mouth 对礼物吹毛求疵
look around 四下环顾
look ahead 考虑到将来
look back 回头看
look back on/over 回顾；回想
look down 向下看
look down on 轻视
look for a needle in a haystack 大海捞针
look for trouble 自找麻烦
look forward to 盼望
look in 顺便看望
look into 调查
look like 看起来像
look on 观看
look one way and row another 声东击西
look out 找出
look over 仔细检查
look up to 尊敬
look towards 往……看去；期待

LEAVE:
leave off 停止
leave out 省略；忽略
leave over 留下；剩下
leave for 离开……前往……

LET：
let alone 更不必说；听任
let be 不打扰
let down 放下，降低；失望、辜负
let in 漏水（汽）等
let into 让……进入
let loose 释放；发出
let off 放掉
let on 泄露秘密
let out 放水、汽；泄露
let pass 放过；不追究
let slide 对……漫不经心
let slip 放走；无意中说出
let up 变小；减弱