first作为副词是否如only一般，在句中位置的变化会影响到句意？

chuRiver

以OG12 90题为例，
Although early soap operas were first aired on evening radio in the 1920s,they were moved to the daytime hours in the 1930s when the evening schedule became crowded with comedians and variety shows.

以下几种不同的位置，如果换作only， 句意会因强调点不同而有所变化，first是否也有这样的功能？
early soap operas were //first// aired on evening radio in the 1920s  强调最开始是广播而不是其他动作
early soap operas were aired //first// on evening radio in the 1920s  强调最开始是在晚上时段
early soap operas were aired on evening radio //first// in the 1920s  强调最开始播放是在20年代

eSpirit

同意！

红尘道士

有道理

zowenny

感觉如果原文修饰的意思不对的话first位置是可以变的，perp里有的一题的。位置变化意思是有出入但是变了位置的选项不一定是错的，only 也是。切忌