广告对我们产生微妙的影响。

[误] Advertisement exerts a subtle influence on us.

[正] Advertising exerts a subtle influence on us.

注：advertising 为广告的总称，是不可数名词，作主语时，谓语动词用单数。advertisement 是可数名词，这类名词还有machinery--machine, baggage --bag, jewelry--jewel, poetry--poem 等。