介词是英语中使用比较活跃的词类之一,特别是一些常用介词搭配,大部分习惯用语都是介词和其他词构成的,而有关时间名词前介词的选用只是其中小部分的内容。现将时间名词前介词应当如何选用列举如下,供同学们学习参考。1.表示年份、季节的名词前用in。如:in1999(在1999年),in200 Prepositions are one of the more active word classes in English, especially some commonly used prepositions. Most of the idioms are composed of prepositions and other words. The selection of prepositions before time is only a small part of the content. Now, how to use prepositional prepositions in time should be listed as follows for students to learn. 1. Use the word in before the noun representing the year and the season. Such as: in1999 (in 1999), in200