这三个词都表示某个时间范围,语义基本相同。实际应用中,三者也具有如下意义上的共同特征: 在S_1(前句)的时间过程中,发生或成立S_2(后句)。 例如: 在我穿鞋的时候,小孩不见了。 但是,尽管三者表示的都是某个时间范畴,语感却是不同的。换句话说,三者对时间范围的把握方法是不尽相同的。 All three words mean a certain range of time and the semantics are basically the same. In practice, the three also have the following common characteristics in the sense that during the time of S_1 (the previous sentence), S_2 (latter sentence) occurs or is established. For example: When I was wearing shoes, the child disappeared. However, although all three represent a certain time frame, the sense of language is different. In other words, the three methods for grasping the time range are different.