Unit 3 Grammar课件2023-2024学年沪教牛津版英语八年级上册

Complete the article. The first computers were _________ than cars, but now they are becoming ________ and _________. Computers can calculate at a _______ speed than we can. Computers are not _________ than human beings, but they may be able to do a _________ job than us. In the past, computers were _______ expensive, but now they are much ________. cheaper cleverer faster smaller bigger more better better The comparative of adjectives When we compare two people or things, we can use the comparative of adjectives. Adjectives Comparative of adjectives cheap cheaper tall taller interesting more interesting expensive more expensive short - shorter small - smaller nice nicer safe safer - - - - - - big thin heavy heavier happy happier 找规律 bigger thinner Grammar Focus delicious – more delicious interesting – more interesting important— more important carefully---more carefully quickly---more quickly slowly---more slowly easily--- more easily 找规律 比较级形式 例词 单音节形容词 大多数单音节形容词 + -er high → higher small → smaller 以-e结尾 + -r large → larger wide → wider 一个元音 + 一个辅音 双写辅音字母，再加-er big → bigger hot → hotter 双音节形容词 以-y或-ly结尾 去掉y，再加-ier happy → happier silly → sillier 以非重读元音、/l/或/R(r)/结尾 + -er(-r) clever → cleverer simple → simpler 以-ful，-less，-ed，-ing结尾 more + 形容词原级 careful→ more careful boring → more boring 多音节形容词 含三个或三个以上音节 more + 形容词原级 difficult →more difficult popular→ more popular I. 请写出以下形容词的比较级和最高级形式。 1. happy ______________ _______________ 2. lucky ______________ _______________ 3. big ______________ _______________ 4. fast ______________ _______________ 5. cold ______________ _______________ 　happier 　　　　happiest 跟踪练习 luckier　　　 　luckiest 　bigger　　　　 biggest 　faster　　　　 fastest 　colder　　　　 coldest 6. thin ____________ ____________ 7. tall ____________ ____________ 8. small ____________ ____________ 9. beautiful ____________ ____________ 10. wide ____________ ____________ thinner 　　　thinnest 跟踪练习 taller