English Water Drop

Mary and the old man.

This old man cannot see.
He is blind.
Mary holds him by the hand.
She is kind to the blind man.

• am - is - are 统称be动词

I am / He is / She is / It is / （复数） We are / You are / They are

• hold sb 牵住某人

  
  宾语变形

him是he的变形，动词后面的he都要变成him

• hold sb by the hand 牵住某人的手
• 主谓宾 我爱你

主语（施加动作的一方） + 谓语（做了什么动作） + 宾语（承受动作的对象）