4.2 重点句型语法剖析-2018-2019学年高二英语上学期人教版选修六同步复习全攻略

重点句型语法剖析 三、重点句型剖析 1. as/so long as引导的条件状语从句 【教材原句】It is OK to leave an electrical appliance on so long as you are using it — if not, turn it off! 只要你在使用电器设备，你可以让它开着，如果不用就把它关掉！ 【方法规律】 (1)so/as long as“只要”，引导条件状语从句。例： Don’t mind what others say as long as we are confident in what we have done. 只要我们对所做的事情有信心就不要介意别人的话。 So long as you help me, I shall never despair. 只要你帮我，我决不会失望。 (2)as long as还可以表示“和……一样长”。例： This line is four times as long as that one. 这条线是那条线的四倍长。 【明辨异同】 辨析as long as, as well as, as far as, as good as 短语 原意 引申意义 as long as 与……一样长 只要 as well as 与……一样好 也；和 as far as 远及…… 就……而言；至于 as good as 与……一样好 几乎 [即学即练] 选词填空(as long as，as far as，as well as，as good as) (1)You can borrow my car ________________ you promise not to drive too fast. (2)We ________________ Tom went to Hainan to spend our holiday. (3)Any book will do ________________ it’s interesting. (4)A distant relative is not ________________ a near neighbour. 2. even if引导让步状语从句 【教材原句】Even if we start reducing the amount of carbon dioxide and other greenhouse gases, the climate is going to keep on warming for decades or centuries. 即使我们开始减少二氧化碳和其他温室气体的含量，在未来几十年或几个世纪内，气候仍会持续转暖。 【方法规律】even if/though意为“即使；尽管”，引导让步状语从句。例： Dean still refused to join in the game, even if/though we all did our best to persuade him. 尽管我们都尽最大的努力去说服Dean，但是他依然拒绝参加这场比赛。 Even if/ though I hadn’t seen my classmate for many years, I recognized him immediately. 虽然已多年没有见到我的同学,我还是一眼就认出了他. 单项填空 Ben went to work as usual this morning ________ he was not feeling well. A. still more B. for instance C. even though D. in case 四、重点语法剖析 It的用法（2） (一)it用作引导词 1. 用作形式主语，代替不定式、动词-ing短语或从句表示的真正主语。例： It is better to lose a friend than to do this. 与其这样做倒不如失去一个朋友。 It is fun for her to study, but it is difficult to study and work at the same time. 对于她来说学习是有趣的，可是要边工作边学习对她来说是困难的。 (1)It +系动词+形容词（或名词）(+of /for +sb)+不定式短语。若要说明动词不定式的动作是由谁做的时候，后接for sb.。能用于这个句型的形容词有：difficult，hard，easy，possible，necessary，important等；如说明动词不定式的逻辑主语的性质、品质、特性时