答案 1.after [引导时间状语从句。] 2.until [“直到”,主句为肯定句时,谓语动词用延续性动词;主句为否定句时,谓语用短暂性动词。] 3.unless [“如果不,除非”,引导条件状语从句,此外还有:once(一旦),in case(万一),when(既然)……] 4.as [as引导让步状语从句,此外常考的还有:although,though,while“尽管”。] 5.because [引导原因状语从句,此外还有:since,as,now that,seeing(that)...] 6.As [此处表示“随着……”,引导时间状语从句。] 7.before [before引导时间状语从句,其意义较多,“还未……就……,……才……”。常考句型:It will be+时间段+before。] 8.Since [同第5题。] 9.where [引导地点状语从句。] 10.wherever [引导让步状语从句,意为“无论哪里……”。] Ⅲ.正反探究 1.【误】 In such dry weather,the flowers will have to be watered if they are going to survive. 【正】 In such dry weather,the flowers will have to be watered if they are to survive. 解析 if 从句中表示将来不能用will,be going to 等,但可以使用if sb/sth is to do sth 结构。 2.【误】 You will be late unless you will leave immediately. 【正】 You will be late unless you leave immediately. 解析 在时间、条件、让步、方式等状语从句中,常用一般现在时表示将来时。 |