still 能和动词的过去式连用么

是可以的
例如：He was still willing to adopt the homeless dog,even though it had a infectious disease.
句子翻译是：他过去任然愿意收养那只流浪狗,尽管那只流浪狗有传染病
He was still very happy,though his didn't win the competition.
句子翻译时：他（过去）仍然很开心,尽管他并没有赢得比赛的胜利