一。知识点归纳。
重点词汇：1、sharp 锋利的 快速的 在……附近 也许 sharp teeth 有锋利的牙齿 fast 跑得快 slowly 走得慢 plant / meat / fish 吃植物/肉/鱼 a lot of water 喝许多水 near lakes 生活在湖附近 four legs 有四条腿 the earth / land 在地球/陆地上 time ago 很久以前 the air / sky 在空中。
重点句型；1、it has sharp teeth.它有锋利的牙齿。
2、it eats plants.它吃植物。
3、it doesn’t fly or swim.他不会飞也不会游泳。
4、it ran but it didn’t fly.他会跑但不会飞。
5、this dinosaur ate fish.这只恐龙吃鱼。
6、dinosaurs lived on the earth a long, long time ago.很久以前恐龙生活在地球上。
7、some walked on the land , some flew in the air and some swam in lakes.一些在陆地上走，一些在天空中飞，一些在湖里游。
8、there was no food or water for dinosaur.恐龙没有了食物和水。
语法。一般过去时态的基本用法：
(1) 一般过去时态表示过去发生的动作或存在的状况，也可以表示过去的习惯，爱好。常与表示过去的时间副词连用，如：an hour ago, yesterday, last sunday/month, just now等。
含有行为动词的一般过去时态，助动词did没有人称和数的变化，其结构是： did+动词原形。
例： he went to school yesterday.
he didn't go to school yesterday.(否定句)
did he go to school yesterday?(一般疑问句)
2)动词的一般过去式的变化原则： a. 规则动词的变化：
b. 不规则动词的变化： do-did, is/am-was, are-were, drive-drove, eat-ate, h**e-had, drink-drank, ride-rode, run-ran, swim-swam, fly-flew, stand-stood, come-came, go-went, become-became, see-saw, hit-hit, put-put, hurt-hurt, get-got, forget-forgot, sleep-slept, sweep-swept, think-thought, bring-brought, catch-caught, teach-taught, buy-bought, tell-told, say-said, sing-sang
they all died. (它们都灭绝了。) all" 用于三者或三者以上都。
例：the students are all in the classroom.
"both" 仅用于两个人或两件事，表示两者都。
例：my mother and father are both teachers. maybe the earth became very cold. (可能地球变得很冷。)
maybe"表示"也许，可能",是副词，在句中作状语，常位于句首，相当于"perhaps".
而在 ".may be ..结构中，may是情态动词，be是系动词，二者合起来共同作谓语：
例：maybe your ruler is on the bed.=your ruler may be on the bed.(也许你的尺子在床上。)
there was no food or water for dinosaurs. (那时候，恐龙没有食物和水。)
此句中，no food or water 相当于no food and no water.
but the fish were afraid of him. (但是鱼很害怕他。)
1) be afraid of 表示"害怕。
例：i'm afraid of dogs.(我怕狗。)
2) be afraid to do sth. 表示"不敢做。
例： her sister is afraid to go out at night。
二。练一练：
1. read and write. (读一读，写一些。）
(1) diplodocus (do/does) not fly2) it walks (slow/slowly).
3) some dinosaurs (eat/eats) meat4) some dinosaurs (do/does) not swim.
5) t. rex doesn't fly (and/or) swim6) baryonyx (h**e/has) a lot of teeth.
7) t. rex runs (fast/slowly8) baryonyx lives near (mountains/lakes.)
2. read and write.(读一读，写出过去式。）
eat fly stay drink swim h**e run live
3. fill in the blanks. (填空，首字母已经给出。）
(1) tim is running to me so f2) dinosaur k has four strong l.
3) there is a big park n my house4) my grandpa is very old. he walks s .
5) some dinosaurs don't eat meat but p6) i l in shenzhen. it is a beautiful city.
7) dinosaur t had s teeth. it can eat meat8) dinosaur s is 2000 kilograms. it is h .
4. choose the correct answers. (根据c部分回答问题。）
1) how did the earth become?
a. coldb. hot.
2) what did water become?
a. ice. b. gas.(气体）
3) were there any food or water?
a. yes, there were. b. no, there weren't.
4) when did dinosaurs live on the earth.
a. 100 years agob. a long, long time ago.
5) what's the one of scientists' ideas?
a. maybe peolple hunted(猎杀） them all. b.
maybe a big rock hit the earth. then dinosaurs died.
part i and write .(读i部分，写写单词。）
(1) people find dinosaur in the river.
2) this dinosaur had a short.
3) it was and fast.
4) we sometimes find dinosaur.
5) maybe dinosaurs their eggs.
6) maybe dinosaurs made.
6. read and write.(读一读，写一写。）
1) his sister (be) a nurse.
2) what did dinosaurs (eat)?
3) tim's father often (go) to work at 7:40.
4) her brother (h**e) lunch at school every day.
5) look at the old man. he walks .(slow)
6) -when (do) you get up yesterday?
7) mary (drink) a glass of milk this morning.
8) dick's grandma (die) last week.
and finish.(读一读，完成后面练习。）
it was a cold day in winter. a farmer found a snake on the ground. it was nearly dead with cold.
the farmer was a kind person. he brought the snake to his house and put ot near the fire. soon the snake began to move.
but it raised its head and tried to bite the farmer. “i s**ed your life, but you thank me like this? you must die and the sooner the better.
”the farmer said. then the farmer killed the snake with a stick.
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