To make a sentence move (happen right now), you need three parts.
She
is the person. The word "is" acts like a
Battery.
It powers the action
walking.
Without the battery (am/is/are), the verb cannot move!
Core Rule: No Battery, No Action!
想要句子“动”起来（表示正在发生），你需要三个部分。
She
是主角。单词 "is" 就像
电池。
它给动作
walking
供电。没有这个电池 (am/is/are)，动词就动不起来！
核心规则: 没有电池，就没有动作！