把我的计划告知他.
I acquaint him with my plans.（主动式）
My plans are acquainted with him.（被动式）
acquaint是及物动词,后面接的是名词人或物或代词,所以acquaint sb with sth,是固定用法,就如把它给我give it to me中give也是做及物动词用的,而不是你说的acquaint接了with而造成及物动词接介词的矛盾.只不过是将它被动化后with就紧跟在后面了