if构成的省略形式look词组知识点详解及训练 The garbage is then taken away and, if possible, recycled.然后垃圾被带走，如果可能的话会被回收利用。 [句型公式] 句中if possible是省略句，表示“如果可能的话”，完整形式是if it is possible。 (1)在if, when, while, once, whether, unless等引导的状语从句中如果含有系动词be的某种形式，且从句的主语与主句主语一致或从句的主语是it时，从句的主语和系动词be可以省略。 (2)if构成的其他省略形式：if so如果这样的话；if not如果不这样的话；if necessary如果有必要的话；if any如果有的话；if ever如果曾经有的话。 [金句推送] (天津卷)As scheduled, we participated in several instructive activities.按照原定计划，我们参加了几次具有教育意义的活动。 [基础练习]——单句语法填空 ①(2019·全国卷Ⅱ)You must keep these points in mind while setting(set) your goals. ②(2016·全国卷Ⅲ)If it is convenient for you，let's meet at 8：30 outside the school gate.If not, let me know what time suits you best. ③The climate here is quite pleasant, the temperature rarely, if ever, reaching 30℃ in summer. [能力提升]——句式升级 普通表达：While we were visiting the art exhibition, we discussed the great artists' works. ①高级表达：While visiting the art exhibition, we discussed the great artists' works.(省略句) 普通表达：I want to avoid the rush hour if it is possible. 高中英语单词表3500词必背 单词快速记忆法 人教版初中英语单词 ②高级表达：I want to avoid the rush hour if possible．(省略句)   look through浏览；翻阅；翻找；审核 look around 环视，四下张望 look back (on) 回顾，回想 look down on/upon 看不起，轻视 look into 朝里看；调查；深入了解 look out 当心，注意 look up 抬头看；查找；查出；查阅 look up to 尊敬，敬仰 look through evening papers in his spare time 他在业余时间读晚报 look into the case further 进一步调查这个事件 no reason for us to look down upon ordinary jobs 我们没有理由轻视普通的工作   [基础练习]——单句语法填空 ①(2018·全国卷Ⅲ) I quickly lower myself, ducking my head to avoid looking directly into his eyes so he doesn't feel challenged. ②(2016·江苏卷)Once I look up something on the Internet, I don't need to keep all the details for future use. ③Please look through your paper before you hand it in to avoid possible mistakes. [能力提升]——词汇升级 ①普通表达：I like to recall my high school days, which were the happiest in my life. 高级表达：I like to look back on my high school days, which were the happiest in my life.  ②普通表达：Mr.Smith has taught for many years, and all the students respect him. 高级表达：Mr.Smith has taught for many years, and all the students look up to him. 多维训练——夯实基础 维度1——用所给词的正确形式填空 1．The trade agreement helped to strengthen(strength) the bonds between the two countries. 2．Concerned(concern) about the health of her son, Mrs.Jackson went to school to visit him every week. 3．It is urgent that food and clothing (should) be sent(send) to the sufferers. 4．Although built(build) ten years ago, the house still looks new. 5．On reading the mother's complaint(complain), I felt a little worried about the son's behavior. 维度2——在空白处填入一个适当的词 1．Look through the newspapers every day and you can keep up with the rapidly developing situation. 2．My uncle hasn't been able to quit smoking, but at least he has cut down． 3．Some false advertisements are taking the countryside women as their targets, because they are easy to take in． 4．The flowers give out a sweet smell, which makes us relaxed. 5．The two parties held the talk in a friendly atmosphere and reached an agreement. 维度3——查缺补漏(单句语法填空) 1．It's frightening(frighten) to think how easily children can be hurt. 2．In China, masses(mass) of graduates go abroad to have a further study every year. 3．The shady trees provide protection(protect) against burning rays of the sun. 4．Caught in the rain on my way home, I had a bad cold.by→in  5．Mike is a student at Howard University，majoring(major) in physics for a degree in Natural Science.