英语：Unit5Vocabulary同步授课课件（译林版八年级上）.ppt

Unit 5 Birdwatchers Vocabulary manners impolite necessary regular irregular dishonest unnecessary correct n. 礼貌，风度 adj. 无礼的，粗鲁的 adj. 必要的 adj. 规则的 adj. 不规则的 adj. 不诚实的 adj. 不必要的 adj. 正确的 New words common impossible unfriendly unwelcome unable incorrect uncommon litter adj. 普通的，一般的 adj. 不可能的 adj. 不友好的 adj. 不受欢迎的 adj. 不能的 adj. 不正确的 adj. 不平常的 n. 垃圾 Using prefixes to form adjectives with opposite meaning. 单词中位于词根前面的部分就是前缀。前缀，可以改变单词的意思。前缀 “dis-”, “im-”, “in-”, “ir-”, “un-” 表示否定。 I don’t believe what he says, because he is not honest. I don’t believe what he says, because he is dishonest. dishonest dishonorable “dis-” This is not a honorable action. This is a dishonorable action. honest ? honorable ? Opposites If someone shows good manners to others, he is a polite person. If someone does not show good manners to others, he is impolite (not polite). polite ? possible ? patient ? impolite impossible impatient “im-” That coat is only 100 yuan. It’s not expensive. That is inexpensive. expensive ? correct ? inexpensive incorrect “in-” His pulse is not regular. His pulse is irregular. regular ? relative ? responsible ? irregular irrelative irresponsible “ir-” friendly ? happy ? comfortable ? safe ? healthy ? unfriendly unhappy uncomfortable unsafe unhealthy “un-” necessary ? welcome ? common ? able ? unnecessary unwelcome uncommon unable Match the adjectives on the left with their opposites on the right. necessary important comfortable honest regular happy uncomfortable irregular dishonest unhappy unnecessary unimportant Learning about birdwatching welcome correct common friendly possible able impossible unfriendly unwelcome unable incorrect uncommon Complete the sentences below. 1. Zhalong is a nature reserve. It is _________ to hunt or fish there. 2. When you go birdwatching, you sometimes have to walk a long way. If you wear new leather shoes, they