Изучаем English Unit 13. Ex'treme and Ex'tremity.
Suffixes and Word Stress (3)
Unit 13; Part A
Some words don't change their stress pattern when a suffix is addedto the root word, but do change the pronunciation of the vowel in themain stressed syllable. Compare: The following table shows a number of possible vowel changes. Themain stressed syllable and the pronunciation of the vowel in thissyllable are shown:
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Unit 13; Part B
In some words, as well as a change in the pronunciation of the vowelin the stressed syllable, there is also a change in the pronunciationof the consonants) that follow it.
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Unit 13; Part C
In other words like this, there is a change in the pronunciation ofthe vowel in the stressed syllable and also the spelling of either thisvowel and/or the consonant(s) that follow it.
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Unit 13; Part D
| Words that do change their stress pattern when a suffix is addedto the root also commonly change their pronunciation in one or moresyllable: pro'nounce - pronunci'ation pre'fer - 'preferable /∂/ /au/ /∂/ /Λ/ /ι//з:/ /e//∂/ There are many words like this, and a great variety of pronunciation changes. |
Exercises
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| Now listen and check your answers. | ||||||
 Look again at the words in exercise 1 with main stress on the samesyllable as their root. Underline the ones which have a different vowelsound in the main stressed syllable from that in the main stressedsyllable in their root. (Some of these are given in A and В opposite.)Key.D: intervention; consumption; sanity; precision; sincerity S: familiarise; security; maturity; delivery; diversion; Example: intervention (intervention /e/ - inter'vene /i:/) | |
| Now listen again to the words in exercise 1 and check your answers. | |
| Complete each pair of sentences using pairs of words from the box. Key.1 a divide b division 2 a competitive b compete 3 a collision b collide 4 a example b exemplary 5 a national b nation collide-collision compete-competitive divide-division example-exemplary nation-national  Example:a It costs £10 a year to subscribe to the sports centre. b I've taken out an annual subscription to the magazine. 1 a We'll ___________ the money between us. b Brighton football club was promoted to the frst ___________. 2 a It's diffcult to stay ___________ in business. b He was much faster and I couldn't ___________ with him. 3 a Rod broke his leg in the ___________. b They say the comet is going to ___________ with Saturn. 4 a She set a good ___________ to her younger sister. b Their behaviour was ___________. 5 a The first of May is a ___________ holiday. b Practically the whole ___________ watched the eclipse. | |
Now listen and check your answers. Then read the sentences aloud. | |
| Write the words from the box in the correct column according to thevowel sound in the main stressed syllable of their root word. There arethree words in each column. Key. 
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 | Unit 12 Unit 13 Unit 14 |  |