Unit 5 语法--形容词句式和It作形式主语讲练 2025-2026学年沪外教版英语八年级下册

第二讲 新沪教牛津版八下Unit5语法--形容词句式 Part 1 形容词句式和It作形式主语 句型一：It is + adj. + for + sb. + to do sth. ________________________________________ 例：It’s very dangerous for children to cross the busy road by themselves. 句型二：It is + adj. + of + n. / pron. + to do sth. ________________________________________ 例：It’s very kind of you to help me. =You’re kind to help me. (1)核心区别：两者都是中考高频句型，核心差异在于形容词的属性不同，决定了用of还是for。 形容词特点 本质含义 of 描述人的品质、性格，如： kind,brave,silly等 赞扬或批评某人本身的特质 for 描述事情的性质、难易程度，如： easy,difficult,important等 说明做某事对某人来说的情况 (2)中考常考形容词清单 of 褒义类 kind(_______),nice(_______),brave(_______),polite(_______),clever(_______), honest(_______),helpful(_______),wise(_______) 贬义类 silly(_______),foolish(_______),careless(_______),rude(_______),selfish(_______) for 难易度 easy(_______),difficult(_______),hard(_______),simple(_______) 重要性 important(_______),necessary(_______),essential(_______) 可能性 possible(_______),impossible(_______),probable(_______) 其 他 dangerous(_______),safe(_______),useful(_______) 【即学即练】填空题 1.对孩子们来说，穿过繁忙的街道很危险。 It’s very________ ________ children to cross the busy street. 2.你离开他是很明智。 It is______ _______ you to leave him. 3.你犯这样的错误，真粗心。 It’s very_______ ______ you to make such a mistake = . 4.对我们来说，完成这项工作很困难。 It’s ________ ________ us to finish the work. 句型三：adj. + enough + to do sth. 意思是 “____________________________”, 该句型可以转换成 “so +adj.+that+从句”的句型。 例：He is strong enough to lift the big stone.=He is so strong that he can lift the big stone. 【拓展】 ①enough是形容词，意为“充足的，足够的”，作定语时，放在名词的________。 例：I have enough time to watch TV. ②enough还可作副词，意为“足够地”，这时enough需放在所修饰的形容词或副词________。 例：The young man is strong enough to carry the heavy bag. 【即学即练】 1. 他足够大以至于能完成这项任务. He is________ ________ ________ finish this task. 2. 他足够聪明可以顺利地做一名领导者. He is_______ _______ _______ be a leader. 3. He is rich enough_______ _______ this new car.(buy) 4. She is pretty enough_______ _______ the gentlemen.(attract) 5. John is strong enough to carry the box. =______________________________. 句型四：too+adj./adv.+to do sth. 意思是 “____________________________”, 该句型可以转换成 “sb/ sth+ be not + adj. + enough to do sth…”的句型。 例：He is too young to go to school alone. =He isn’t old enough to go to school alone. = He is so young that he can’t go to school alone. Part 2 随堂练习 一、用for或of填空 1. It is possible _______ him to get there on time. 2. It was silly ________ you to leave the keys at home. 3. Is it important _________ us to learn a foreign language? 4. It was brave _________ him to save the girl. 5.It is difficult _________ such a little boy to run fast. 二、单项选择 1.It’s necessary for us ________ to our parents when we have problems. A．to talk B．talking C．talk D．talked 2．It’s patient __________ you __________ for two hours here. A．for; wait B．for; to wait C．of; wait D．of; to wait 3．It is important __________ us to protect the wildlife. A．for B．of C．to D．on 4．__________ wrong of the women to wear the clothes made __________ animal fur. A．It’s; up B．That’s; up C．It’s; of D．That’s; of 5．Don’t worry. It’s __________ to work out this problem. A．easy enough B．easily enough C．enough easy D．enough easily 6．It’s stubborn（固执的） __________ Tom __________ his mind. A．for; not change B．for; not to change C．of; not change D．of; not to change 7．It’s not easy __________ him to take care of _________ many children during the trip. A．of; such B．for; such C．of; so D．for; so 8. It’s wrong ________ you ________ your parents’ advice. A．for；don’t accept B．of；not to accept C．for；not accept D．of；not accepting 9. It is ________ of the people to ________ money to the poor. A．important; donating B．generous; raising C．meaningful; raise D．helpful; donate 10.The water in this village is not _______. A. enough clean to drink B. enough clean drinking C. clean enough to drink D. clean enough drinking 三、用所给词的正确形式填空 1. They are strong enough ________ (protect) themselves. 2. People are cutting down forests,so the pandas ________ (lose)their homes. 3. The classroom is too small ________ (hold)40 students. 4. Although they are big and heavy，it isn't difficult for them ________ (climb) trees. 5. It's very nice of you ________ (give) me so many stamps. 6．It is necessary for us__________ (take) action to reduce the air pollution. 7．It is kind of you __________ (help) me with my lessons. 8．She is too busy __________ (go) shopping. 9．It is __________ (danger) for children to play with fire. 10. She is smart enough__________ (solve) this difficult math problem. 四、完成句子 1．她真高，能够得着书架的顶部。 She is the top of the bookshelf. 2．学习好的礼仪对孩子来说是很重要的。 ____________________________________________ good manners. 3．Nancy is too weak to carry the heavy box. (改为同义句) Nancy carry the heavy box. 4.你真是太好了，能来为我画画。 It’s very nice _______ _______ _______ _______ pictures for me. 5.—你有足够的时间来桂林旅游吗？—是的，但我没有足够的钱。 —Are you__________to go on a trip to Guilin?  —Yes. But I don’t have ____________ . Part 3 课后作业 一、单项选择 1.--Uncle Wang, let me help you carry the heavy box. --Thank you, Jack. It’s very nice ________ you ________ me. A．of; helping B．of; to help C．for; to help D．for; helping 2.It’s _________ of you to wait _________ for your turn every time. A．polite; polite B．politely; politely C．polite; politely D．politely; polite 3.________ is necessary for students to get up early and go to bed early. A．This B．It C．What D．That 4．It is very important ________ the work on time. A．finish B．finished C．to finish D．finishes 5．--It’s kind ________ him to help me with my study. --Yes, he is always kind ________ everyone. A．for, of B．of, to C．to, of D．to, to 6．It's time ________ an English lesson. A．have B．to have C．having D．had 7．It’s a good way ________ English by ________ English movies. A．to learn; to watch B．learning; watching C．to learn; watching D．learning; to watch 8．It was careless ________ Helen to lose her camera. A．of B．by C．on D．for 9．It is impossible _________ how large the universe is. A．to imagine B．imagining C．imagine D．imagined 10．It's necessary for us ________ English well. A．to learn B．learning C．learn D．learns 二、单句语法填空 1. It is important____________us to learn English well. 2. It is kind____________you to help me with my homework. 3. The box is light____________for the little boy to carry. 4. The movie is____________interesting that I want to watch it again. 5. The room is ____________ small to hold so many people. 6. It is necessary for everyone____________（follow） the rules. 7. It is clever of her____________（work）out the problem so quickly. 8. He is old enough____________（go）to school by himself. 9. The story is so moving____________many people cried. 10. The ice is too thin____________（skate）on. ( 第 1 页 共 7 页 ) 学科网（北京）股份有限公司 $