我认为应该这样说：His movements are very standard.

movement

1. an act of moving the body or part of the body （身体部位的）运动，转动，活动

•hand/eye movements 手╱眼睛的活动

•Loose clothing gives you greater freedom of movement. 衣服宽松，可以活动自如。

2. an act of moving from one place to another or of moving sth from one place to another 移动；迁移；转移；活动

•enemy troop movements 敌军的调动

motion

1.[Using.] the act or process of moving or the way sth moves 运动；移动；动

•Newton's laws of motion 牛顿的运动定律

2.[C] a particular movement made usually with your hand or your head, especially to communicate sth （为传递信息用手或头做的）动作

At a single motion of his hand, the room fell silent. 他手一挥，屋子里便安静了下来。

action

1.the process of doing sth in order to make sth happen or to deal with a situation行动；行为过程

•The time has come for action if these beautiful animals are to survive. 若要使这些美丽的动物能生存下去，现在就要行动起来。

2.[C] a thing that sb does 所做之事；行为

•Her quick action saved the child's life. 她行动迅速，救了小孩的命。

3. ( technical 术语) the way a part of the body moves or functions （身体部位的）动作，功能

•a study of the action of the liver 对肝功能的研究