As far as I canremember he was supposed to be on a business trip to Lisbon.
像此句满足过去时与目前事实相反么？
As far as I canremember he was supposed to be on a business trip to Lisbon.
不要动辄就是虚拟语气。语境可能是：公司在上周安排他到里斯本出差（宣传商品或参加订货会），用一般过去时表明他已经去了。这是说话人目前回忆起此事，说这句话的。从句指目前的记忆，主句指过去的状况。
【翻译】据我所知（据我记忆所及），他应该是去里斯本出差了。