本刊读者提出以下五个问题问一:为什么下面句子中动词 keep 要用动名词形式.而动词 move 却不用?"He turned slowly and,keeping his head down,moved in the direction of his father’s voice."答:如果去掉 keeping his head down,这个句子就变成了 He thrned slowly and moved in the direction of his fa-ther’s voice.可见,连词 and 连接的两个动作 turned 和moved 是并列的关系,而非从属的关系。keeping his headdown 所要说明的是伴随 moved 的一种状态,类似于一种从属关系,即当他朝父亲的声音的方向走去的时候,头是低着的。如果把 moved 改成 moving,不仅无法理解它与 turned