Unit 5--第3课时 （内文）-【学导练】2026年八年级下册英语课件PPT（沪教版）

英语 八年级 下册 配上海教育版 返回目录 英语 八年级 下册 配上海教育版 Unit 5 Saving animals in danger 返回目录 英语 八年级 下册 配上海教育版 第3课时 Grammar 返回目录 英语 八年级 下册 配上海教育版 目 录 CONTENTS 01 语法聚焦 02 课堂练习 返回目录 英语 八年级 下册 配上海教育版 一、it作形式主语 当动词不定式在句子中作主语时，为了保持句子平衡，避免头重脚轻，常用it作形式主语置于句首，而将真正的主语——动词不定式放在句尾。此时的it起引导作用，没有词义。it 作形式主语时有以下两种常考句型： 语法聚焦 返回目录 英语 八年级 下册 配上海教育版 1. It is+adj. +for sb+to do sth. It is+adj. +for sb+to do sth. 意为“对某人来说，做某事是……的。”，其中的形容词是用来描述事物的特征，常见的此类形容词有：difficult, convenient, important, impossible, possible, necessary, easy, hard等。如： It is difficult for me to fall asleep. 我很难入睡。 It is important for us not to play in dangerous places. 不到危险的地方玩耍对我们来说是重要的。 返回目录 英语 八年级 下册 配上海教育版 2. It is+adj. +of sb+to do sth. It is+adj. +of sb+to do sth. 意为“某人做某事是……的。”，其中的形容词是用来描述人的性格、品质等,常见的此类形容词有：nice, kind, polite, rude, clever, good, foolish, wise, cruel等。如： It is kind of you to help me. 你帮助我真是太友善了。 It was foolish of her not to follow her mother's advice. 她不听她妈妈的劝告，真是愚蠢。 返回目录 英语 八年级 下册 配上海教育版 二、adj. +enough+to do sth adj. +enough+to do sth 意为 “足够……去做某事”，enough用作副词，修饰前面的形容词，表示程度，enough后面的动词不定式表示结果。如： The boy is tall enough to reach the book on the shelf. 这个男孩足够高，能够得着架子上的书。 The towel is soft enough not to hurt my skin. 这条毛巾足够柔软，不会伤害我的皮肤。 返回目录 英语 八年级 下册 配上海教育版 【拓展】 1. 动词+adv. +enough+to do sth 也意为“足够……去做某事”，是关于enough的另一常见结构，此时enough用于修饰前面的副词。如： She sings well enough to join the choir. 她唱得足够好，可以加入合唱团。 返回目录 英语 八年级 下册 配上海教育版 2. not … enough to … 可与too … to … 互换使用，not后面接的形容词是too后面接的形容词的反义词。如： The baby panda is not old enough to eat bamboo. =The baby panda is too young to eat bamboo. 熊猫宝宝太小了，还不能吃竹子。 返回目录 英语 八年级 下册 配上海教育版 一、按要求完成下列各题 1. 那位女士在公共汽车上给一位老人让座，她真是太友善了。（根据汉语意思完成句子，每空一词） It is __________ _________ the lady ________ ____________ her seat to an elderly person on the bus. 课堂练习 kind of to offer 返回目录 英语 八年级 下册 配上海教育版 2. 拥有健康的饮食习惯对我们来说是有必要的。（根据汉语意思完成句子，每空一词） It's ____________ ____________ us __________ ____________ healthy eating habits. 3. 这间房子足够大，能住6个人。（根据汉语意思完成句子，每空一词） The house is___________ ____________ for six people ____________ ____________ in. necessary for to have big enough to live 返回目录 英语 八年级 下册 配上海教育版 4. 我不够勇敢去面对困难。（根据汉语意思完成句子，每空一词） I'm not ____________ ____________ ____________ ____________ the difficulties. 5. 有些同学不够自信，不敢在公众面前讲话。（根据汉语意思完成句子，每空一词） Some students are not ____________ ____________ ____________ ____________ in public. brave enough to face confident enough to speak 返回目录 英语 八年级 下册 配上海教育版 6. To climb tall trees is difficult for polar bears. (改为it作形式主语) _____________________________________________________________ 7. You are nice to share your toys with me. (改为it作形式主语) _____________________________________________________________ 8. The problem is not easy enough for me to work out. (改为同义句) _____________________________________________________________ It is difficult for polar bears to climb tall trees. It's nice of you to share your toys with me. The problem is too hard / difficult for me to work out. 返回目录 英语 八年级 下册 配上海教育版 9. 你能记住所有的单词真聪明。(翻译句子) _____________________________________________________________ 10. 这个箱子太重，我搬不动。(翻译句子) _____________________________________________________________ _____________________________________________________________ It's clever of you to remember all the words. The box is not light enough for me to carry. / The box is too heavy for me to carry. 返回目录 英语 八年级 下册 配上海教育版 二、单项填空 (　　)1. Lin Tao ran _____ to get the first place in the 100-metre race. (2025黑龙江绥化) A. enough fast B. fast enough C. slow enough (　　)2. Lucy is a good reader. She is _____ to get the deep meaning of this book. (2025江苏常州) A. too smart B. too slow C. smart enough D. slow enough B C 返回目录 英语 八年级 下册 配上海教育版 (　　)3. It is common _____ many students to lose marks because they do not read the questions carefully. (2024甘肃白银改编) A. on B. in C. of D. for (　　)4. ____________ is impolite to talk loudly in public places. (原创题) A. It B. That C. This D. One D A 返回目录 英语 八年级 下册 配上海教育版 (　　)5. It's foolish _____ you to think that it is not necessary _____ us to complete the work on time. (原创题) A. of; of B. for; for C. of; for D. for; of C 返回目录 英语 八年级 下册 配上海教育版 三、语法填空 Many animals are in danger. In order to protect the animals, World Animal Day falls on the 1.____________ (four) day of October. Protecting animals has got much attention all over the world. It is necessary 2.____________ us to make the world a better place for all animals. fourth for 返回目录 英语 八年级 下册 配上海教育版 Every year there is some important information about the plants and animals in danger. The giraffe is one of 3.____________ (they). Over the last 30 years, the number of giraffes has dropped by 40%. Things are getting much 4.____________ (bad). Now there are fewer 5.____________ 100,000 giraffes in the world! Many animals are losing their lives because of human activities. They are often 6.____________ (kill) for their meat, teeth or fur. them worse than killed 返回目录 英语 八年级 下册 配上海教育版 Animals will get more help if everyone 7.___________ (start) to do something. Here are some things we can do. Love animals. We could give them a hand when it is necessary. Then they can live 8.____________ (happy) with us. Protect their homes. We must stop 9.____________ (cut) down forests and polluting rivers. In this way, animals can have a safe place to live. starts happily cutting 返回目录 英语 八年级 下册 配上海教育版 Speak up for wildlife. Animals can't speak for themselves. We can be 10.___________ voice for our animal friends. Learn more about animals' difficult situations. By learning about their problems and pains, we can find new ways to help them. a 返回目录 英语 八年级 下册 配上海教育版 THANKS! 返回目录 英语 八年级 下册 配上海教育版 $