1、1、由 as soon as, immediately, directly, instantly, the moment, the instant, the minute, 等引导的时间状语从句。这些连词都表示“一就” 。 I will go there directly I have finished my breakfast. 吃完早饭，我立即到那里去。 The moment I heard the news, I hastened to the spot.我一听到消息，马上赶到了出事地点。 As soon as I reach Canada, I will ring you up. 我一
2、到加拿大，就给你来电话。 注意：hardly(scarcely, rarely)when / before, no soonerthan 相当于 as soon as 之意。主句用过去完成时，从句用一般过去时。当 hardly, scarcely, rarely 和 no sooner位于句首时，主句应用倒装语序。 He had no sooner arrived home than he was asked to start on another journey. 他刚到家，就被邀请开始另一旅程。 No sooner had the sun shown itself above the ho
3、rizon than he got out of bed to commence work.太阳刚从地平线上升起，他就起床劳动去了。 Hardly had I sat down when he stepped in.我刚坐下，他就进来了。 He had hardly fallen asleep when he felt a soft touch on his shoulder.这个阿拉伯人刚要入睡就感到肩膀上被轻轻一触。2、由 by the time 引导的时间状语从句。注意时态的变化：在一般情况下，如果从句的谓语动词用一般过去时，主句的谓语动词用过去完成时；如果主句的谓语动词用一般现在时，主
4、句的谓语动词用将来完成时。如： By the time you came back, I had finished this book.到你回来时，我已经写完这本书了。 By the time you come here tomorrow, I will have finished this work. 你明天来这儿的时候，我将已经完成此工作了。注意：在时间状语从句中，不能用一般将来时、过去将来时态或将来完成时，而要用相应的一般现在时态、一般过去时或现在完成时来代替。如：Ill telephone you as soon as I get there. 我一到达那里就打电话给你。She said she would phone me as soon as she got there. 她说她一到达那里就给我电话。Dont get off the bus until it has stopped. 等车停稳后才下车。
