Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries because they are unwilling to have their names entered as having taken out such and such a book, for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.
这是新概念4 lesson15中的一段话,里面的这个短语as having taken out such and such a book,解析说是介词as加动名词短语作方式状语。我认为解析是错的,我觉得应该是连词as后跟现在分词作时间状语,但是好像没有这个用法吧。还请专家老师帮忙解答下。