有些学生用铅笔画的线条十分僵硬,甚至把纸划破,不易擦改。究其原因,除因人小,手部肌肉力量不足控制不好外,主要是握笔不当造成。他们多数是用拇指第一关节处勾住食指,使笔杆被“虎口”挟住,垂直向下。由于拇指第一关节向左横凸,会遮住笔尖,影响视线,因此头就不得不向左歪,迫使左肩低,向后拉,右肩高向前向下压,加大了整个手臂的承受力。加上拇指把食指和笔杆一起攥握住,指力太紧,笔杆太正,使整个右臂处在僵硬的状态中,这样画出的线条自然是呆滞、生硬的线条了。所以应让学生掌 Some students draw very stiff lines with pencil and even scratch the paper, making it hard to change. The reason, in addition to small, poor hand muscle strength control, mainly caused by improper grip pen. Most of them use the first finger of the thumb to hook the forefinger so that the pen is pinched by the “tiger's mouth” and dropped vertically. As the first thumb to the left transverse convex, will cover the pen nib, affect the line of sight, so the head had to left crooked, forcing the left shoulder low, pull back, right shoulder high forward and downward pressure, increased the entire arm Endurance. Plus the thumb holding the index finger and the pen together, that the force is too tight, the pen is too positive, so that the entire right arm in a rigid state, so drawn lines are naturally dull, stiff lines. So let the students palm