外研版（新教材）高中英语必修第一册Unit 2 Using language 课件.pptx

Unit 2 Exploring English;1. Look at the sentences and expressions from the reading passage. Match the words in bold to the types of word formation. ;More examples in the reading passage:;When? you?open?a?dictionary,?you?often come across a lot of unfamiliar words. You might think this is a bit scary. But many of them are formed using other simple words. This is called word formation. Words formed by combining other words are called compounds, for example, 1. _________ (a friend that you contact by riting, traditionally using a pen) and 2. ___________ (known by many people). Prefixes and suffixes often have fixed meanings. If you add un- or in- to a word, the new word usually means the opposite. For example, if something isn’t correct it’s 3. _________, and if someone isn’t happy they’re 4. _________. Words with the suffixes -ment and -ness;are often nouns. For example, if somebody has improved a lot, they have made great 5. ____________. Some nouns and adjectives can be used as verbs, or the other way round. When we calm somebody down, they become 6. _______ And we can give someone a present by 7. ___________ it. And sometimes a word is made up of the first letters of several words: “World Trade Organization” can be referred to as 8. _______, and 9. _______is short for “as soon as possible”. It is impossible to know the meaning of every word, but knowing about word formation can help us guess their meanings.;3. Works in groups. Choose one type and come up with as many words as possible. ;summary;转化法（Conversion）：把一种词性转化为另一种词性，词形不变。转化后的词义可以通过原词义可以通过原词义推断出来。;合成法（Compounding）：把两个或两个以上的独立且语义不同的单词合成一个新词，构词方式较灵活。合成词的词义通常可以由组成它的单词的词义推测出来。;派生法（ Derivation ）：在词根上加前缀或者后缀，构成新词。前缀和后缀有一定的含义或功能，有助于推测新词的词义。一些常见的前缀、后缀及其含义或功能如下。;缩略法（ Abbreviation ）：用单词或短语的部分内容代指整体。;American and British English;Let’s complete the passage with the words above.;gas;5. Work in pairs. Find more examples of differences between American and British English. Use a dictionary or search on the In