In the dark he felt around for the switch.黑暗中他摸来摸去找开关。

生活中常用到的一个动作，（用手、脚或棍子去）寻找，固定的动词搭配是：fell (about / around) (for sb. / sth.)。
　　例句：
　　He felt in his briefcase for a pen. 他在公文包里找一支笔。
　　The blind man felt along the wall for the staircase. 那位盲人沿墙摸索着找楼梯。
　　She felt in her pocket to see what money she had. 她伸手摸摸兜里有多少钱。