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课件网) Unit 2 Morals and Virtues Period 3 Discovering useful structures The best portion of a good man's life is his little, nameless, unremembered acts of kindness and love. -William Wordsworth 非谓语动词 不定式to do 过去分词done 独立主格 现在分词doing 动名词doing 1.作定语 2.作表语 4.作状语 3.作宾补 现在分词 Focus on 基本用法 the –ing form used as adverbial 1. Walking in the street, I saw a tailor's shop. 2. Being poor, he couldn't afford a TV set. 3. His father died, leaving the family even worse off. 4. Using your head, you will find a good way. 5. Studying hard, he didn't pass the exam. 6. He earns a living driving a truck. 7. He sat in the chair reading a newspaper. 时间 原因 结果 条件 让步 方式 伴随 1. When I walked in the street, I saw a tailor’s shop. 2. Because he was poor, he couldn’t afford a TV set. 3. His father died and left the family even worse off. 5. Though he studied hard, he didn’t pass the exam. 4. If you use your head, you will find a good way. 7. He sat in the chair and read a newspaper. 6. He earns a living by driving a truck. 动词-ing形式是非谓语动词的一种，兼有动词和形容词的特征，在句中可作表语，定语，宾语补足语和状语，一般表示进行或主动的意思。 动词-ing形式用作状语时，其逻辑主语必须与句子的主语一致，动词-ing形式所表示的动作和句子的主语是主动关系。 动词-ing形式在句中可以作时间、原因、条件、让步、方式、伴随和结果状语。 动词-ing形式作状语 现在分词作时间状语时，相当于时间状语从句。可在现在分词前加连词“when, while, until”等，使其时间 意义更明确。 Walking in the park,she saw an old friend. ＝When/while(she was)walking in the park,she saw an old friend. 当她在公园里散步时，她看到了她的一个老朋友。 v-ing形式作时间状语 现在分词作原因状语时，可转换为由since, because或as引导的原因状语从句，这类状语多放在句子的前半部分。 Being ill，he couldn't go to school. ＝As he was ill，he couldn't go to school. v-ing形式作原因状语 现在分词作条件状语时，可转换为if, once或unless等引导的条件状语从句。 Working hard，you'll make great progress. ＝If you work hard，you'll make great progress. v-ing形式作条件状语 现在分词作让步状语时，相当于一个以though/although引导的让步状语从句。 Working or reading，she always did her best. ＝Whether she worked or read，she always did her best. v-ing形式作让步状语 (1) Working hard, you will succeed. = If you _____, you will succeed. = _____ and you will succeed. Exercises Work hard Work hard (2) _____(prepare) fully, we can achieve great things. _____(prepare) fully and we can achieve great things. If we _____(prepare) fully, we can achieve great things. Preparing Prepare prepare (1). 现在分词作让步状语，可置于句首或 句末，常与though, although, while, even if/though等连用。 (2).现在分词作让步状语相当于一个_____ (连词though等通常保留)。 Step 6 让步状语 让步状语从句 (1). Though his father worked from morning till night, he didn’t get enough food. = _____ _____ from morning till night, his father didn’t get enough food. Exercises Though working 1. _____ ... ...
