Unit5 Understanding ideas 知识清单 2025-2026学年外研版八年级英语下册

八年级英语下册Unit5-Understanding ideas 一、句型解析 1. "Imagine a dinosaur in an ancient forest."​ 结构：祈使句(Imagine + 宾语 + 介词短语) 含义：想象……的情景 例句：Imagine a world without pollution. 2. "It is running around looking for its next meal."​ 结构：现在进行时 + 现在分词作状语 含义：正在……同时做…… 例句：She is sitting there reading a book. 3. "For hundreds of years, people believed that..."​ 结构：For + 时间段，主语 + 动词过去式 + that从句 含义：在……期间，人们…… 例句：For many years, they lived in this small town. 4. "However, thanks to a piece of amber, scientists now know..."​ 结构：However + , + thanks to + 名词, + 主句 含义：然而，多亏了……，……现在知道…… 例句：However, thanks to modern technology, we can communicate easily. 5. "They can tell us whether dinosaurs had feathers."​ 结构：tell + 间接宾语 + whether引导的宾语从句 含义：告诉我们是否…… 例句：Can you tell me whether the library is open? 6. "This species no longer grows in this area."​ 结构：主语 + no longer + 动词 含义：不再…… 例句：He no longer works here. 7. "But the find proves that it did 35 million years ago."​ 结构：prove + that从句，did替代前面提到的动词 含义：但是这一发现证明它确实…… 例句：The evidence proves that he was right. 8. "Scientists used to believe that ants came from..."​ 结构：used to + 动词原形 含义：过去常常……（现在不这样了） 例句：I used to play basketball every day. 9. "Who knows whether this piece of amber will tell us more secrets?"​ 结构：疑问词引导的疑问句，whether引导宾语从句 含义：谁知道是否…… 例句：Who knows whether it will rain tomorrow? 10. "We should put more effort into research."​ 结构：put effort into + 名词/动名词 含义：把更多努力投入到……中 例句：You should put more effort into your studies. 二、知识点挖空填写 根据课文内容填空：​ 1. For hundreds of years, people ______ (believe) that dinosaurs looked like huge lizards. 2. ______ to a piece of amber, scientists now know this idea is wrong. 3. In the amber from Southeast Asia, they found the tail of a dinosaur - ______ feathers. 4. These beautiful golden stones quietly ______ (keep) pieces of the past. 5. They can tell us ______ dinosaurs had feathers. 6. This species no ______ grows in this area. 7. The find ______ (prove) that it did 35 million years ago. 8. Thanks to amber, more than 300 unknown ______ (species) have been discovered. 9. Scientists ______ to believe that ants came from the northern half of the earth. 10. We should put more ______ into research. 三、固定搭配与重点短语 look for​ 寻找 look like​ 看起来像 thanks to​ 多亏了，由于 tell sb. whether...​ 告诉某人是否…… for example​ 例如 no longer​ 不再 over time​ 随着时间的推移 more than​ 超过，多于 used to​ 过去常常 a piece of​ 一块，一片 put effort into​ 把努力投入 a window on the past​ 了解过去的窗口 四、配套练习 A. 用所给词的适当形式填空 1. People ______ (believe) dinosaurs were like lizards for hundreds of years. 2. Amber ______ (help) us understand life on earth. 3. Scientists ______ (discover) many new species thanks to amber. 4. This flower no longer ______ (grow) here now. 5. We should ______ (put) more effort into research. B. 选择正确的短语填空 (thanks to, look like, used to, no longer, for example) 1. ______ modern science, we know more about dinosaurs. 2. Many dinosaurs ______ have feathers, not scales. 3. Some animals, ______ pandas, are in danger. 4. He ______ lives in Beijing; he moved to Shanghai. 5. What does this strange insect ______? 五、参考答案 知识点挖空答案： 1. believed 2. Thanks 3. with 4. keep 5. whether 6. longer 7. proves 8. species 9. used 10. effort 配套练习答案： A.​ 1. believed 2. helps 3. have discovered 4. grows 5. put B.​ 1. Thanks to 2. used to 3. for example 4. no longer 5. look like 1 学科网（北京）股份有限公司 $