英语状语从句知识点

英语状语从句知识点 英语状语从句知识点 引导条件状语从句的从属连词有 if, unless (=if…not 假如不……，除非), as/so long as(只要), while(=as long as 只要), supposing (that)/provided /providing (that)(假如), in case(假使), on condition that(在……的条件下)等。如： You can learn anything so long as you set your mind to learn it. 用心学本领，总能学到手。 I will go there tomorrow unless it rains.(=…if it doesn’t rain)除非下雨，否则我明天要去那儿。 He will do the work providing you pay him. 假如你能付费，他可以做这工作。 In case l forget，please remind me about it. 假如我忘了，请提醒我。 We’ll let you use the room on condition that you keep it clean and tidy. 我们可以让你使用这个房间，条件是你把它保持干净。 注：条件状语从句和时间状语从句一样，从句的谓语动词不能用一般将来时态、过去将来时态或将来完成时，而要用相应的一般现在时、一般过去时和现在完成时态来替代。又如： Tell me in case you get into difficulty. 遇到困难请告诉我。 Supposing he does not come, shall we go without him? 假如他不来，是不是不带他去? 但若从句谓语用了 will 或 would，那 will 或 would 则是表示“同意”的.情态动词。如： If you will go with me, I’ll wait for you. 假如你同意等我，我们就帮你做这事儿。 谈谈状语从句的省略问题 为了简洁起见，有的状语从句(如时间状语从句、条件状语从句、方式状语从句等)有时可省略从句的主语和部分谓语(尤其是当从句主语与主句主语一致，且从句谓语包括有动词 be 时)： She fell asleep while (he was) doing his homework. 他在做作业时睡着了。 While (he was) doing so, he trembled a little. 他这样做时稍稍颤抖了一下。 He opened his mouth as if (he was) to speak. 他张开口，好像要说话似的。 Often she would weep when (she was) alone. 她一个人时，常常哭泣。 I’d like to see you whenever (it’s) convenient. 在你方便的时候我想来看看你。 If (you are) traveling north，you must change at Leeds. 假如你是向北行，你必须在里兹...