课堂笔记：

1． A perfect alibi，（标题）极好的不在犯罪现场的证据。
alibi n.为法律用语，含义是“不在场证明”、“当时不在场的申辩”，是可数名词
Ian had an alibi/alibis for that morning.
伊恩有那天上午不在场的证据/证明。
与它搭配的动词通常有offer，prove，set up 等。
prove an alibi/set up an alibi【律】证明被告当时不在犯罪现场
n.借口，托词
Late again, Richard? What's your alibi this time?
理查德, 又迟到了? 这次你有什么借口呢?
vi.
辩解，找借口(+for)
Who would alibi for that guy?
谁会愿意为那个家伙辩解?
The boy alibied for being late. 
这男孩为他迟到找借口。 

2 at the time=（at the moment when something happened）the murder was committed是定语从句，定at the time...

3 commit
commit vt.
（1）犯（罪），做（错事、坏事等）：
A murder was committed at 8 o'clock this morning.
今天早上8 点钟发生了一起凶杀案。
He has never committed any crime before.
他以前从来没有犯过罪。
（2）承诺，使承担义务，卷入（经常与反身代词连用）：
commit oneself/sb to sth/doing sth
You should know each other better before committing yourselves to marriage.
在缔结婚姻以前，你们应该更好地互相了解。
He has committed his friend to taking part in the race.
他使他的朋友答应参加比赛。
He has commited himself to raising his brother's kids.
他已经答应抚养他弟弟的孩子。

4． confirm vt.
（1）证实，确定：
My employer will confirm that I was there on time.
我的雇主会证明我是按时到那儿的。
His words are confirmed.
他的话得到了证实。
（2）巩固，加强：
His experiences in that company confirmed his decision to have a factory of his own.
他在那家公司的经历坚定了他想自己拥有一个工厂的决心。
What he saw and heard that night confirmed his belief that the pub was haunted.
那天晚上的所见所闻使他更加坚信那个小酒店有鬼魂出没。
（3）comfirm sb （as/in sth...）批准
After a three-month probationary period,she was confirmed in her post.
经过三个月的试用期后，她获准正式任职。

5. I was there on time. 我是按时到了那儿的。
on time 为固定短语，表示“准时”、“按时”（注意它与in time 的区别）：
The train arrived on time.
火车正点到达了。
Can you arrive on time?
你能准时到吗？
Tom is never on time. He always keeps other people waiting.
汤姆从来不准时。他总是让别人等。

in time （for sth/to do sth）
Will I be in time for the train/to catch the train?
我赶得上那趟火车吗？
Can we get to the station in time?
我们能及时到达车站吗？
迟早......
Swimming is difficult but you'll learn it in time. 
游泳不好学，但你迟早会学会的。

6. suppose
vt. 猜想；料想
I suppose you are quite happy in your new position. 
我想你在新的工作岗位上一定很愉快。 
vt. 设想；假定
Let us suppose that the news is really true. 
咱们假设这个消息是真的。
be supposed to  应该 
Everybody is supposed to know the law
人人都该懂得法律

7 And you didn't notice anything unusual? 您没有注意到有什么异常情况发生吗？
这是一个陈述疑问句，即它具备与陈述句同样的基本语法结构，但用升调提问。这种句子在英语中不常用：
You' re out of work?
Yes, I' m afraid I am.
You aren' t hungry?
No, I had a big breakfast.
你失业了吗？
是的，恐怕是这样。
你不饿吗？
不，我早饭吃得很多。
不定代词如anything，something 等被形容词修饰时，形容词必须跟在不定代词之后：(常见的不定代词有all，both，each，every等，以及含有some-，any-，no-等的合成代词，如anybody， something，no one。)
There is something important that we need to do.
有一些重要的事情需要我们做。
This is something special.
这很特别。
This isn't anything important.
这并不重要。
I'd like something cheaper.
我想买点较为便宜的东西。

8 suggest
依我看...... 恐怕......
I suggest that he is not so honest as he looks.
依我看他并不像他看上去那么诚实。
I suggest that the car crash was not accidental.
恐怕这起汽车撞车事故不是偶然的。
suggest sb doing sth.
advise sb to do sth
I suggest him not smoking.
I advise him not to smoke.

9 You see, on the morning of the murder, the 8 o'clock train did not
run at all. 您看，在凶杀发生的那天早晨，8 点钟的那次车根本没有发。
1）you see 在口语中经常作为插入语出现，句首、句中或句尾均可
以，表示“你知道”、“事实上”等含义：
He was not really interested in the film, you see.
事实上，他对那部电影并不是真的感兴趣。
My leg isn't all right yet, you see, so I can't climb the hill with you.
你知道/你看，我的腿还没有完全好，所以我不能和你（们）一起爬山。

2）run 可以指火车、公共汽车、船等“定时/定期行驶”、“（在两地间）往来”：
Buses run every ten minutes here.
这里的公共汽车每10 分钟一班。
This ship runs between Dover and Calais.
这条船来往于多佛与加来之间。

10 break down机器等出毛病，出故障。不运行
The machine broke down. 
机器坏了。 

11 take off取消，撤消
The show had to be taken off because of few(poor) audiences.
因观众太少而取消演出。
（飞机）起飞
take sth off 脱下（衣服，物品等）
（观念，产品等）突然大受欢迎，产品销售量急升
The new dictionary has really taken off.
这部新字典极受欢迎。
take sb off模仿或假扮某人
He likes to take his teacher off. 
他喜欢模仿他的老师。 
休假
take the day off休息一天
I am taking next week off.我下周休假。