[析] On 加动名词表示一就。本句的译文应是:我一进入教室就听见这个好消息了。又如:on hearing 一听见, on arrival 一到达就(on表示动作的名词)?
[误] In the beginning of the book, there are some interesting stories.?
[正] At the beginning of the book, there are some interesting stories.?
[析] at the begining与at the end都是指某事物的开始与结束部分,均不指时间范围,而in the beginning 则是指开始一段时间。in the end=at last是指最终,终于之意。?
[误] Till the end of next week. I will have finished this work.?
[正] By the end of next week. I will have finished this work.?
[析] by 引起的时间状语表示了动作的截止点,其意思为不迟于某一时刻将工作做完,所以主句一般是完成时态。当然可以有将来时态,如:I'll be there by five o'clock.而till则表达其一动作一直持续到某一时刻,但句中的动词一定要用持续性动词,而瞬间的截止性动词应用其否定句式,如:I won't finish this work till(until) next weekend.?
[误] He came to London before last weekend.?
[正] He had come to London before last weekend.?
[正] He came to London two weeks ago.?
[析] before 一般要与完成时连用,而ago则与一般过去时连用。?
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