探究点1 “Why don't + 主语 + 动词原形 + 其他?”句式
“Why don't + 主语 + 动词原形 + 其他?”句式用来提出自己的建议或征求对方的意见，意为“为什么不……呢?”，相当于 “Why not + 动词原形 + 其他?”句式。
Why don't you ask your teacher for help?
= Why not ask your teacher for help?
你为什么不向老师求助呢?
情境应用
1. we go shopping this weekend?(为什么不)
2. call me then?(为什么不)

1. Why don't
2. Why not

探究点2 dangerous 的用法
dangerous 是形容词，意为“危险的；有危害的”。dangerous 的名词为 danger，不可数名词，常见搭配为 in danger，意为“处于危险之中”。
It is very dangerous to climb a mountain on snowy days. 下雪天爬山是很危险的。
These animals are in danger.
这些动物正处于危险之中。
情境应用
1. I don't like wolves because they are .(danger)
2. Fish are often when they look for food.(处于危险之中)

1. dangerous
2. in danger

Ⅰ. 将下列句子中汉语部分译成英语，注意使用适当的形式
1. —Why don't you like snakes?
—Because they are .(吓人的)
2. —Can who the girl is in the picture?(你猜)
—Is she perhaps your cousin?
3. We all know that giraffes have .(长脖子)
4. Look! What a it is!(大鲨鱼)
5. It for people to give food to wild animals.(危险的)

1. scary
2. you guess
3. long necks
4. big shark
5. is dangerous

1. “吓人的”用来形容蛇的特性，应用形容词scary。
2. “你猜”是祈使句中的动词原形开头结构，“你”应用you，“猜测”应用动词原形guess。
3. “长脖子”表示复数概念，因为长颈鹿的脖子不只一个（这里指长颈鹿这种动物普遍具有的特征），所以用复数形式necks，“长的”是long，所以是long necks。
4. “大鲨鱼”中“大”用big，“鲨鱼”用shark，前面有a，所以用单数shark。
5. “危险的”是形容词dangerous，此句型是It is +形容词+for sb +to do sth，所以用is dangerous，但题目只需填词组部分，所以是is dangerous。

Ⅱ. 阅读判断
根据短文内容判断正误(正确“T”，错误“F”)。
A man has a cat. He likes it very much. When he eats, the cat sits at the table with him. The man eats with a knife and fork, but the cat eats from its plate(盘子). Sometimes, when the cat finishes its food, the man will give his food to the cat.
One day the cat is not at the table at lunchtime. “Ah! Where is my cat?” asks the man. His wife says, “Can't you eat without(没有)it?” So the lunch begins without the cat. Before the lunch is over, the cat runs into the room and jumps onto the chair quickly. It has two mice(老鼠)in its mouth, and before anyone can stop it, the cat drops(扔下)one into its plate, and the other into the man's plate. “Dear me!” cries the woman, “a mouse is in your plate!”
“Hush!” says the man, “this shows that it is a nice cat. It loves me too! It knows what friendship(友谊)is. It wants me to eat its food.”
() 1. The man likes his cat very much.
() 2. The man never gives his food to the cat.
() 3. One day the cat is not at the table at lunchtime.
() 4. The cat goes home with two mice in its mouth when the man and his wife are having lunch.
() 5. The story tells us the cat doesn't love the man.

1. T
2. F
3. T
4. T
5. F

1. 根据短文第一段“A man has a cat. He likes it very much.”可知该句描述正确。
2. 从短文第一段“Sometimes, when the cat finishes its food, the man will give his food to the cat.”可知该句“The man never gives his food to the cat.”描述错误。
3. 由短文第二段“One day the cat is not at the table at lunchtime.”可知该句描述正确。
4. 依据短文第二段“Before the lunch is over, the cat runs into the room and jumps onto the chair quickly. It has two mice(老鼠) in its mouth”可知该句描述正确。
5. 从短文最后男人的话“this shows that it is a nice cat. It loves me too! It knows what friendship(友谊)is. It wants me to eat its food.”以及前文猫的行为可知故事体现猫是爱男人的，该句“The story tells us the cat doesn't love the man.”描述错误。