3. A woman saw it happen when she walked past.一位妇女走过的时候，看到了事情的发生。
英语中一些感官动词如 see，hear，watch，feel等，常跟不带 to的动词不定式（即动词原形）作宾补，意思是“看见（听见、感觉）某人/某事发生的全过程”。除此之外，其后也可以跟V-ing表示一个动作正在进行。如：
I often hear her sing this song．我经常听到她唱这首歌。
I felt the earth move just now．我刚才感觉到大地动了一下。
We saw him playing football on the playground. 我们看见他在操场上踢足球。（看和踢的动作同时进行）
past在这里作副词，意思是“从旁边”，可用by代替。past作名词时，意思是“昔日，过去”，作形容词时意思是“过去的”。如：
He walked past me, without a word．他从我身边走过，没有说一句话。
The past is past. Nothing can bring it back．过去的一切永远过去了，无法使它再回来。
4. Let’s move that bag, or there may be an accident.我们把那个袋子搬开吧，否则，会出交通事故。
这是一种“祈使句+or+简单句”的并列句，连词or相当于if not，意为“否则，不然的话”。前面的部分带有条件意味，此句可改写为：If we don’t move that bag, there may be an accident.如：Hurry up, or you’ll be late. 快点，否则你就会迟到。
6. It is nice of you.
是“It is + adj. . + 介词”结构。在这个结构中，介词of用得最多。例如：
It is very good of you to do so. 你这样做太好了。
It is so polite of him. 他太礼貌了。
[情景]此句式用来赞扬对方或向对方表示感激，意为“你真好！”如：
–Here are some flowers for you.
–It’s nice of you. Thank you very much.
Thanks for your help. It’s really nice of you.
[解析] 该句式还可扩展为It’s (That’s ) + adj. + of sb. + to do sth.。这类形容词有nice, good, kind, clever, right等。如：
That’s very kind of you to say so.谢谢您这么说。
注意：表示性质、品格、品德之类的形容词，后面的介词用of.其他的形容词（表示大小、方位、形状等普通形容词）多用for或者to. 例如：
The sun is far for us to see. 太阳看上去离我们太远了。
It is very easy for me to do so. 这样做对我来说太容易了。
8. With the medicine box under her arm. Miss Zhao hurried off to look after the man. 赵老师腋下夹着药箱匆忙赶去照顾那个男的。
With the medicine box under her arm是介词短语作伴随状语。With在此意为“夹着”，它和其后的名词或代词构成介词短语，表示附带情况。如：
A woman looked worried, with a child in her arms.一个女人抱着个孩子，显得很着急。
He likes sleeping with the window open．他喜欢开着窗户睡觉。
With the light on, we began to work again．灯亮了以后，我们又开始干了起来。
With these words, the tiger jumped into the river．说着这些话，老虎跳进了河里。
另外，“with +名词”这一结构在句中可作后置定语。如：
China is a country with a long history.中国是一个历史悠久的国家。
Lesson 97 多媒体教学设计方案
Teaching Objectives:
Grasp the general question of past continuous tense and some words and phrases.
1. 句型：
1）You’d better go to bed earlier tonight．
2） A woman saw it happen when she was walking past．
3）My wallet dropped on the ground when I was walking in the park
4）You look tired today.
2. Words and expressions
play the piano/violin/guitar/flute, watch video tape, review, look tired/young/worried, mend, forget sth./forget to do sth. had better(not) do sth., novel, accident, wallet, walk past, give sth. (back) to sb.
3．过去进行时态的陈述句和疑问句
We were not traveling too fast.
Was she traveling too fast?
Teaching procedures:
Step 1 Revision
（学生活动）让学生就What were you doing at … yesterday?互相提问复习过去进行时。
（录像演示）演示过去进行时表示过去某个时刻正在进行的动作，让学生进行模仿练习
Step 2Ask and answer
Ask the students Was he watching TV at eight o’clock at night? . Help students to answer “Yes, he was.” or “No, he wasn’t.”
（录像演示）情景演示过去进行时的疑问形式，然后由学生小结出过去进行时态陈述句式和疑问句式的构成：was/were +主语+ving+其它
教学新词汇Russian, motorbike, review（利用图片和用英文解释）
Step 3 Practice
（录像演示）演示Dialogue 1的情景，回答：Why is the speaker tired? (the speaker went to bed too late)
讲解新词汇novel和短语had better(not)do sth.的用法。
You’d better go to bed earlier tonight, if you can.
had better加动词原形表示：最好做某事，用来向别人提出建议。可缩写为：’d better。如：
You’d better watch carefully before you cross the road．过马路之前你最好要看仔细。
We’d better hurry up，or we’ll be late．我们最好快一点，要不然就晚了。
如果建议别人最好不做某事，使用“had better not加动词原形”这一句型。如：
You’d better not read in bed．It’s bad for your eyes．你最好不要躺着看书，对你眼睛不好。
You’d better not play basketball after lunch．It’s bad for your health．你最好不要在午饭后就玩篮球，它对健康有害。
（录像演示）演示Dialogue 21的情景，回答：What happened to A? (His wallet dropped on the ground.)
教学新词汇wallet and ground（利用图片）
解释句型A woman saw it happen when she was walking past.中的see sth. happen用法。
Step 4 Exercises
Fill in the blanks with correct tenses.
1. As my father________(leave) the house, the postman ________(arrive).
2.Tom______(work)in the garden, while I_________(sit)in the sun.
3. As I ________ (walk ) down the street, I ______ ( meet ) Charlie.
4. While he________(read) the letter, he_________ (hear) a knock at the door.
5. She ________(drop) the tray when I spoke to her.
Keys: 1. was leaving, arrived 2. was working, was sitting 3. was walking, met 4. was reading, heard 5. dropped
，Unit 25 The accident