Unit6语法讲解及习题：It is + adj. + (for_of sb.) + to-infinitive 句型-2025-2026学年译林版英语八年级下册

译林英语八下Unit6语法讲解及习题 It is + adj. + (for/of sb.) + to-infinitive 句型 一、语法讲解 1. 核心句型1:It is + adj. + to-infinitive 这是一个形式主语句型,It 是形式主语,真正的主语是后面的动词不定式(to-infinitive)。这个句型用来表达对某件事的看法或评价。 结构 功能 例句 It is + adj. + to do sth. 表达对做某事的看法,形容词描述事情的性质。 It is important to help people in need.(帮助有需要的人很重要。) It is wonderful to watch them enjoy their lessons.(看着他们享受课堂很美好。) 特别注意: 这个句型中,It 只是一个占位符,避免句子头重脚轻。 可以转换为:To help people in need is important.(但原句更常用) 2. 核心句型2:It is + adj. + for sb. + to-infinitive 在句型1的基础上,加入 for sb. 来明确动作的发出者。形容词通常描述事情的难易、重要性等客观属性。 结构 功能 例句 It is + adj. + for sb. + to do sth. 描述对某人来说,做某事是怎样的。 It is important for blind children to receive an education.(对盲童来说,接受教育很重要。) It is difficult for the teachers to find good ways to teach.(对老师来说,找到好的教学方法很难。) 常见形容词:important, necessary, difficult, easy, possible, necessary, wonderful 3. 核心句型3:It is + adj. + of sb. + to-infinitive 这个句型用来评价某人的品格或行为。形容词通常描述人的性格、品质等主观属性。 结构 功能 例句 It is + adj. + of sb. + to do sth. 评价某人做某事的行为,说明某人怎么样。 It is nice of the government to create special schools.(政府真好,建了这些特殊学校。) It is kind of the teachers to work with these children.(老师们真好,和这些孩子一起工作。) 常见形容词:nice, kind, good, clever, polite, rude, silly, thoughtful, helpful, generous 二、语法习题 (一)用 It is + adj. + to-infinitive 句型完成句子 1. _ (important) _ (help) people in need. 2. _ (wonderful) _ (watch) them enjoy their lessons. 3. _ (meaningful) _ (work) as a volunteer. 4. _ (right) _ (give up) seats to the elderly. 5. _ (good) _ (help) blind people cross the road. 6. _ (helpful) _ (donate) money to charities. 7. _ (nice) _ (visit) an old people's home. 8. _ (necessary) _ (build) more homes for the elderly. 9. _ (difficult) _ (find) good ways to teach blind children. 10. _ (easy) _ (make) friends with the children. (二)用 for 或 of 填空 1. It is important _ blind children to receive an education. 2. It is necessary _ the government to build special schools. 3. It is difficult _ the teachers to find good ways to teach. 4. It is nice _ the government to create special schools. 5. It is kind _ the teachers to work with these children. 6. It is right _ us to give up seats to the elderly. 7. It is good _ us to help blind people cross the road. 8. It is helpful _ us to donate money to charities. 9. It is wonderful _ me to watch them enjoy their lessons. 10. It is meaningful _ us to work as volunteers. (三)单项选择 1. It is very kind _ you to help me with my English. A. for B. of C. to D. with 2. It is necessary _ us to learn English well. A. for B. of C. to D. with 3. It is important _ blind children to receive an education. A. for B. of C. to D. with 4. It is nice _ the government to build special schools. A. for B. of C. to D. with 5. It is difficult _ the teachers to find good ways to teach. A. for B. of C. to D. with (四)按要求改写句子 1. To help people in need is important.(用 It is + adj. + to-infinitive 改写) _ 2. The government created special schools. It is nice.(用 It is + adj. + of sb. + to-infinitive 合并) _ 3. The teachers work with these children. It is kind.(用 It is + adj. + of sb. + to-infinitive 合并) _ 4. Blind children receive an education. It is important.(用 It is + adj. + for sb. + to-infinitive 合并) _ 5. We help blind people cross the road. It is good.(用 It is + adj. + of sb. + to-infinitive 合并) _ (五)短文填空 Amy: I've decided to volunteer at the Sunshine Care Centre. I think it's (1) _ (important for the government / important of the government) to provide the elderly with necessary care. It's (2) _ (kind of their families / kind for their families) to send them to the centre since they don't have time to look after them. It's (3) _ (helpful of the workers / helpful for the workers) to take care of the elderly. My mother said it's (4) _ (nice of me / nice for me) to work there. It's (5) _ (meaningful for us / meaningful of us) to help others. 三、参考答案及解析 (一)用 It is + adj. + to-infinitive 句型完成句子 1. It is important to help 2. It is wonderful to watch 3. It is meaningful to work 4. It is right to give up 5. It is good to help 6. It is helpful to donate 7. It is nice to visit 8. It is necessary to build 9. It is difficult to find 10. It is easy to make (二)用 for 或 of 填空 1. for(描述对盲童来说,事情很重要) 2. for(描述对政府来说,事情有必要) 3. for(描述对老师来说,事情很难) 4. of(评价政府的行为很好) 5. of(评价老师的行为很善良) 6. of(评价我们的行为是对的) 7. of(评价我们的行为很好) 8. of(评价我们的行为很有帮助) 9. for(描述对我来说,事情很美好) 10. for(描述对我们来说,事情很有意义) (三)单项选择 1. B(kind 是描述人的品质,用 of) 2. A(necessary 是描述事情的属性,用 for) 3. A(important 是描述事情的属性,用 for) 4. B(nice 是描述政府的行为,用 of) 5. A(difficult 是描述事情的属性,用 for) (四)按要求改写句子 1. It is important to help people in need. 2. It is nice of the government to create special schools. 3. It is kind of the teachers to work with these children. 4. It is important for blind children to receive an education. 5. It is good of us to help blind people cross the road. (五)短文填空 1. important for the government(描述对政府来说,提供照顾很重要) 2. kind of their families(评价他们的家人送老人来的行为很善良) 3. helpful of the workers(评价工作人员照顾老人的行为很有帮助) 4. nice of me(评价我去工作的行为很好) 5. meaningful for us(描述对我们来说,帮助别人很有意义) ( 1 ) 学科网(北京)股份有限公司 $