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t afraid of the lion. 13) When Watt observed the power of steam, he was helping his wife to prepare breakfast. 14) He was selfless, responsible and modest。 Unit Nine: Requirements for Effective Sentences and Oftwitnessed Sentence Improprieties in English Learners 學(xué)習(xí)內(nèi)容預(yù)告: 本單元之后,我們將簡(jiǎn)要討論英語不同語體中的語言特點(diǎn)。 Requirements for Effective English Sentences: 1) Unity ( 語義完整 ) 2) Coherence ( 句式連貫 ) 3) Conciseness ( 表達(dá)簡(jiǎn)潔 ) 4) Emphasis ( 重心突出 ) Most problems occur with (2) and (3). Let’ s now look at them one by one. 1) Unity: A sentence has unity when it expresses a single plete thought in words. Faulty: Born in Ulm of Germany in 1879, Albert Einstein grew up to be a famous physicist. Faulty: The boy is too young. Note: In specific context of conversation, the second type of sentence fragments may be clear. Another fault type: runon sentences (串句 指的是用逗號(hào)連接的兩個(gè)獨(dú)立的單句 。 that’ s why he became a great scientist. 15) To teach him a lesson, he was fined 5 dollars. 16) While waiting for my friends to say goodbye, the moon rose above the horizon. 17) When learning to spell English words, spelling rules should be remembered. 18) Mrs. Jones, a hardworking and single woman, was among his neighbors. 19) They have to study these subjects, no matter they like it or not. 20) He is the person who was appointed to be class representative by the whole class. Of course, it takes a considerably long time to improve your English. So long as you keep working hard, some day you’ ll be successful. Next week, I shall present a lecture on the styles in English.