I knock up after work every day.
每天下了班，我都筋疲力尽。
know about？知道，了解，听说
例句
I know about him， but I’ve never met him.
我听说过他，可从来没有见过他。
know of？知道
例句
Isn’t tomorrow a holiday？
明天是假日吧？
kill time？消磨时间
例句
While I was waiting for her， I killed time by looking in the show window.
我等她的时候，浏览陈列窗消磨时间。
L
last but not least？最后也是最重要的
例句
And last but not least there is the question of adequate funding.
最后同样重要的问题是要有足够的资金。
last time？上次；最后一次
例句
Last time I saw him， he was so fat！
我上次见到他时，他那么胖！
later on？稍后
例句
I’ll come and see you later on.
我稍后会来看望你。
laugh at？嘲笑；因……而发笑
例句
Others may laugh at her， but I like her.
别人或许会笑她，但是我喜欢她。
lay by？搁置；储蓄
例句
The old woman had laid by a little money.
这位老太太积蓄了一点钱。
lay down？放下
例句
She lay down for half an hour.
她休息了半小时。
lay off？下岗；不再做打扰人、讨人厌等的事；不再做或使用有害的事物等例句
Lay off！ You’re messing up my hair！
住手！你把我的头发都弄乱了！
lead the way？带路；示范
例句
I’ll lead the way. You just follow.
我来带路，你们跟着好了。
lead to？通到；导致，引起
例句
This misprint led to great confusion.
这个印刷错误造成很大的混淆。
leak out？漏出，渗出；泄漏
例句
The water was still slowly leaking out.
水仍在慢慢地渗出来。
learn about/of？获悉，得知，认识到
例句
I’m sorry to learn of/about your illness.
听说你病了，我十分难过。
learn by heart？默记，背诵
例句
We need to learn by heart more words.
我们需要记住更多单词。
learn one’s lesson？得到教训
例句
I’ll never do that again； I’ve learned my lesson！
我再也不做那种事了，我已有了教训！
leave alone？放任，顺其自然；不烦扰，不干涉例句
I cannot bear to leave him alone.
我不忍心让他独自留下。
leave off？停止；不再穿
例句
Pullovers can be left off in this warm weather.
天气这么暖和，可以不穿套头毛衣了。
lend a hand？帮助
例句
Lend a hand with this table， will you？
帮帮忙，搬一下桌子好吗？
let alone？更不要说
例句
I never thought of it， let alone did I do it.
我想都没有想到它，更谈不上去做了。
let down？放下；辜负，使失望
例句
Please let down the blinds.
请把百叶窗放下来。
let go？放开；发射；释放
例句
Will they let the hostages go？
他们会释放人质吗？
let in？放进，嵌入；允许……进入；改窄，改瘦例句
Open the window and let in some fresh air.
打开窗户，让新鲜的空气进来。
let it go？不再多说，不再多做，就那
样吧
例句
I thought she was hinting at something， but I let it go.
我想她是有所指，不过我没有理会。
let on？泄密；假装
例句
Don’t let on that you know me.
别让人知道你认识我。
let out？放大；泄露；发出
例句
She let out a scream of terror.
她发出恐怖的叫喊。
let up？减弱，缓和，减少，减小，放松
例句
Will the rain ever let up？
雨什么时候才能小些？
liable for？对……有责任
例句
He is liable for the fault of his son.
他应该为他儿子的过失负责。
liable to？易于，可能
例句
A feeble attempt is liable to fail.
愚蠢的尝试多半是要失败的。
lie down？躺下
例句
I do not feel well. I’d like to lie down.
我觉得不舒服，我想躺下来。
light up？点燃；照亮；放光彩，容光
焕发
例句
He took his time lighting up a cigarette.
他不慌不忙地点了一支烟。
line up？形成一排，排队；安排或组织
例句
He’s lined up a live band for the party.
他已为聚会安排了一个伴奏乐队。
little by little？一点一点地，渐渐地
例句
Little by little the snow disappeared.
雪渐渐消失。
live on？靠……生活，以……为食；继续生活或存在例句
You can’t live on 200 calories a day.
一天200卡热量是维持不了生命的。
live up to？达到预期标准；够得上；遵守
例句
He finds it hard to live up to his ideals.
他认为很难按自己的理想办事。
live with？与……住在一起；接受或容忍某现象例句
It’s a pleasure for me to live with you.
和你一起生活对我来说是件愉快的事情。
lock up？锁起来，关起来
例句
We lock up our house when we go out.
我们如果外出时把房子锁起来。
long for？渴望
例句
The children are longing for the holidays.
孩子们盼望放假。
look about？四处寻找，察看；考虑
例句
He said he would look about who might be able to help us.
他说，他要留心看看谁能帮我们的忙。
look after？照管，照应
例句
He needs to properly look after his son.
他需要好好照顾儿子。
look at？看，瞧；检查；考虑或研究
例句
I’m taking my car to the garage so that they can look at it.
我要把汽车送到修车厂去检修。
look down on/upon？看不起，蔑视
例句
I wish you wouldn’t look down on this kind of work.
我希望你不要看不起这种工作。
look for？寻找；期待
例句
Are you still looking for a job？
你仍在找工作吗？
look forward to？期待，盼望
例句
We should look forward to the future.
我们应该展望未来。
look into？调查
例句
We’ll look into the matter first before coming to a decision.
我们先研究一下，然后再作决定。
look on？观看，旁观，面向；将……看作；以某种态度看待例句
How do people in general look on her？
人们一般对她怎么看？
look out？注意，警惕
例句
Look out！ There’s a car coming.
小心！有辆汽车来了。
look over？过目；检查
例句
Look over exercises before handing them in.
把练习检查一遍再交。
look round？环顾，察看；观光
例句
She looked round when she heard the noise behind her.
她听到身后有声响，就回过头去看。
look through？对某人故意视而不见；快速检查某事物；仔细检查例句
She just looked straight through me.
她对我连理都不理。
look up？仰视；查找；看望或接触某人
例句
Do look me up next time you’re in London.
你下次到伦敦，务必来找我。
lose control of？失去控制
例句
I lost control of myself and hit him.
我控制不住自己，打了他。
lose heart？泄气，灰心
例句
No matter what you do， never lose heart.
不管你做什么千万不可泄气。
lose one’s way？迷路
例句
Keep to the path or you may lose your way.
沿着这条路走，否则你会迷路的。
lose weight？减肥
例句
You must cut down on sugar to lose weight.
你必须少吃糖以减轻体重。
lots of？许多
例句
Your kind help saved lots of trouble for me.
你的好心帮忙省了我许多麻烦。
M
mad about/on？狂热迷恋
例句
He’s mad about her.
他爱她爱得如醉如痴。
mad at/with sb.？生气，愤怒
例句
I’m mad at his obstinacy.
他顽固不化把我气得火冒三丈！
mad with？因……发狂
例句
I went mad with joy and danced a little jig.
我欣喜若狂，跳了几步吉格舞。
make a face？做鬼脸
例句
He made a face at the taste of the soup.
尝了尝汤的味道，他做了一个鬼脸。
make a fool of？愚弄，欺骗
例句
Are you trying to make a fool of me？
你想把我当傻瓜吗？
make a fortune？赚大钱
例句
He made a fortune on the stock market.
他在股票交易中发了财。
make a fuss？过分关怀，过分体贴；大惊小怪，小题大做例句
Why should we make a fuss about it？
我们何必为它小题大做呢？
make a living？谋生
例句
The farmer tugged all his life to make a living.
这个农民终生为生活而劳碌。
make a mistake？犯错误
例句
It’s easy to make a mistake.
犯错误很容易。
make （both） ends meet？收支平衡
例句
We should try to make both ends meet.
我们应该试着收支平衡。
make believe？假装
例句
She makes believe not to hear me.
她假装没有听到我的话。
make clear？解释，阐明
例句
You will have to make clear what you mean.
你得把你的意思说明白。
make friends？交朋友
例句
I made no attempt to make friends with her.
我没有打算要和她做朋友。
make fun of？取笑，嘲笑
例句
They always try to make fun of me.
他们老是开我的玩笑。
make it？成功；及时到达
例句
He’s never really made it as an actor.
他当演员从未有所成就。
make no difference？无关紧要，没有多大关系例句
Flowers make no difference to this room.
这房间有没有花没什么区别。
make out？理解；看出；起草
例句
Can you make out what that sign says？
你看得见牌子上写的是什么吗？
make over？转让；移交；改造
例句
The basement has been made over into a workshop.
地下室已改建成工作间了。
make room for？为……让出地方
例句
Can you make room for me？
能腾出位子给我吗？
make sense？有意义；合理；有道理
例句
It would make sense to leave early.
还是早点儿走好。
make sure？保证，尽力做到；深信，有把握
例句
Ia order to make sure that he was at home， I called him up in advance.
为了确定他在家，我事先打电话给他。