Unit 4 Period 2 Using language-【优学精讲】2024-2025学年高中英语选择性必修第二册教用课件(外研版)

Period 2　Using language it作形式主语 返回目录 下一页 上一页 要义详析·探究语法 CONTENTS 目 录 要义详析·探究语法 01 课堂微练·即时检验 02 01 要义详析·探究语法 (1)(教材P50)When I saw the tragic scenes on the news, I felt it was my duty as a doctor to go there and offer my help. 看到新闻里的悲惨场景时，我深感作为一名医生，我有责任去提供帮助。 (2)(教材P50)It is important to remember that Ebola doesn't respect national boundaries. 我们要明白，埃博拉病毒的传播不分国界。 返回目录 下一页 上一页 要义详析·探究语法 (3)(教材P52)In a world still facing so many problems，it is absolutely essential for us all to collaborate to create a global community with a shared future of peace and prosperity. 在一个仍然面临许多问题的世界上，共同创造一个具有和平与繁荣的未来的全球共同体，对我们大家来说都是很有必要的。 (4)(译林必修一U3)Finally, it should be pointed out that enjoying the company of a crowd is not the same as being with friends. 最后，应该指出的是，与一群人在一起和与朋友在一起，不是一回事。 返回目录 下一页 上一页 要义详析·探究语法 (5)(人教选必三U4)It so happened that one morning I bought a newspaper and read the advertisement about the Antarctic expedition. 碰巧有一天早上，我买了一份报纸，看到了有关南极探险的广告。 (6)It is pointless trying to argue with him because he is stubborn and unwilling to listen to anyone's opinions other than his own. 和他争论是没有意义的，因为他很固执，除了他自己的想法，他不愿意听取别人的意见。 返回目录 下一页 上一页 要义详析·探究语法 句(1)(2)(3)中的it指代的是__________________；句(4)(5)中的it指代的是_________；句(6)中的it指代的是__________________。　 动词不定式(短语) 主语从句 动词-ing形式 返回目录 下一页 上一页 要义详析·探究语法 当动词不定式(短语)、动词-ing形式或者主语从句作句子的主语时，通常用it作形式主语，而将真正的主语放在后面，以保持句子结构的平衡。此时it只起先行引导作用，本身无词义。 返回目录 下一页 上一页 要义详析·探究语法 类型 常用句型 it代替动词不定式(短语)作形式主语 1．It＋be＋adj.＋(for/of sb.) to do sth. 2．It＋be＋n.＋to do sth. 3．It takes (sb.) some time to do sth. 4．It＋be＋up to sb.to do sth. it代替动词-ing形式作形式主语 It's no use/no good/useless/a waste of time/...＋ doing sth. 返回目录 下一页 上一页 要义详析·探究语法 类型 常用句型 it代替主语从句作形式主语 1．It＋be＋n.(a pity/a shame/a fact/an honour/no wonder/...)＋that/what... 2．It＋be＋adj.(strange/natural/important/surprising/ obvious/true/fortunate/possible/impossible/(un)likely/certain/...)　＋that/whether... 3．It＋不及物动词(短语)(happens/turns out/occurs to me/appears/seems/...)＋that... 4．It＋be＋过去分词(said/reported/hoped/known/ believed/...)＋that... 5．It doesn't matter＋that/wh-... 返回目录 下一页 上一页 要义详析·探究语法 1．在“It＋be＋adj.＋(for/of sb.) to do sth.”句型中，当形容词描述动词不定式所表示动作的特征时，介词用for；当形容词描述的是人的品质、性格时，介词用of。 2．在“It＋be＋suggested/required/desired/ordered/proposed/ necessary/important/strange/...＋that...”句型中，主语从句用虚拟语气，即“(should＋) 动词原形”。 返回目录 下一页 上一页 要义详析·探究语法 单句语法填空/完成句子 (1)It was important ___ me to learn that you don't have to always get everything right the first time and that good things come with continual effort. (2)It's generous __ the little girl to share them with the others though she loves her toys so much. for of 返回目录 下一页 上一页 要义详析·探究语法 (3)It ________(say) that his friends had found enough evidence supporting his innocence, which gave him hope that he would soon be cleared of all charges. (4)It is required that secondary high school students _____________(take) exercise at least one hour every day. (5)It appears ____ people are more dependent on the Internet now, as they rely on it for information, communication, entertainment, and various other aspects of their daily lives. was said (should) take that 返回目录 下一页 上一页 要义详析·探究语法 (6)(2023·全国乙卷)我们有必要掌握一些基本的生活技能。 ____________________________ some basic living skills. (7)(2022·全国甲卷)作为高中生，保护海洋是我们的责任。 As high school students, ____________________________________． It is necessary for us to master it's our responsibility to protect oceans 返回目录 下一页 上一页 要义详析·探究语法 (8)试图说服这样的人加入我们真是浪费时间，因为他已经下定决心，不太可能改变他的决定。 ________________________________________ such a person to join us, because he has already made up his mind and is unlikely to change his decision. It is a waste of time trying to persuade 返回目录 下一页 上一页 要义详析·探究语法 02 课堂微练·即时检验 Ⅰ.单句语法填空 1．It is important ___ modern young people to master at least two foreign languages, as it can broaden their horizons and enhance their competitiveness in the job market. 2．It took us more than two hours _________(repair) the computer, but the effort was worth it.　 3．It never occurred to me ____ you could succeed in persuading him to change his mind, given his stubborn nature. for to repair that 返回目录 下一页 上一页 课堂微练·即时检验 4．They are good friends. __ is no wonder that they share similar interests and values, and enjoy spending time together. 5．It is no use _______(argue) with him because he is unlikely to change his opinion or behaviour, regardless of what others say. 6．As teachers, we believe that it is our duty __________(educate) our children to be good citizens. It arguing to educate 返回目录 下一页 上一页 课堂微练·即时检验 7．It is demanded that everyone_____________(hand) in their exercises in time to ensure that the teacher can assess them promptly and provide feedback accordingly. 8．It is very kind __ you to assist me to clean the dusty shelf, which saved me a great deal of time and effort. 9．It is still a mystery ____ caused the infectious virus to spread quickly in this hospital. (should) hand of what 返回目录 下一页 上一页 课堂微练·即时检验 10．It ________(know) to all that the gun powder was first invented by the Chinese, marking a significant milestone in the history of military technology and weapons development. is known 返回目录 下一页 上一页 课堂微练·即时检验 Ⅱ.语法与写作 1．遵守规则，维护社会秩序，保障人民生活安定是每个人的责任。 _________________________________________ to keep the society in order and people's lives safe. 2．在我们的日常饮食中摄入过多的脂肪和糖分没有好处，因为它会导致各种健康问题，如肥胖、糖尿病和心脏病。 __________________________________________ in our diet, as it can lead to various health issues such as obesity, diabetes, and heart disease. It is everyone's responsibility to obey the rules It is no good taking in too much fat and sugar 返回目录 下一页 上一页 课堂微练·即时检验 3．他能否参加珍妮的生日聚会还不确定，因为他这几天的日程安排很紧。 _______________________ he can come to Jenny's birthday party or not, as his schedule is quite tight these days. 4．我们有必要学习更多的生活常识，因为这对独立生活和个人成长至关重要。 __________________________ more living knowledge, as it is essential for independent living and personal growth. It is uncertain whether It is necessary for us to learn 返回目录 下一页 上一页 课堂微练·即时检验 5．显而易见，这对我们的学习有很大帮助，尤其是对我们的英语听力。 _____________________________________________, especially to our English listening. It is obvious that this is of great help to our study 返回目录 下一页 上一页 课堂微练·即时检验 $