英语口语Unit 05.pptVIP

English Front Vowels Central Vowels English vowels vowel classification The English pure vowels can be classified according to the height of the raised part of the tongue the part of the tongue raised the position of the lips Three factors for the description of English vowels: I. The height of the body of the tongue – highest point of tongue (vertical axis); II. The front-back position of the tongue – highest point of tongue (horizontal axis); III. The degree of lip rounding - lip posture Front vowels central vowels: their description / i:/ high, front, unrounded vowel / I / lower high, front, unrounded vowel / e / mid, front, unrounded vowel / ? / low, front, unrounded vowel / ?: / mid, central, unrounded vowel / ? / mid, central, unrounded vowel /I/ hit bit pit /e/ bet set head / ? / bat pat fat /з:/ bird her fur /?/ about aware flower Listening: p51-52 Listening: checking Listening: discrimination Speaking: imitation (p52) Say after me A (1-5) B (1-5) C (1-5) D (1-5) Reading aloud – Pay special attention to the pronunciation of front vowels and central vowels. Electric Cars People were interested in making electric cars as early as the 1840s. One small electric car was made then, but it didn’t work well. Then, in 1912, General Motors produced an electric truck. These electric vehicles were of course not made for the public to buy. General Motors was the first to try again in the last decade. It was a big challenge. An electric car needs a battery. But the batteries are heavy and don’t work well. None of them could power a car far enough or long enough. And the new technology costs a lot. They did succeed finally. The car they built was called the EV1 and it became available in California in 1998. It was the first electric car designed and sold by a large automobile company. Reading aloud –  Identify words that are stressed first. Pay special attention to the pronunciation of front vowels and centr