here is some milk for you.为什么不能写成是here some milk is for you.

here is some milk for you.为什么不能写成是here some milk is for you.
here is some milk for you.为什么不能写成是
here some milk is for you.

here is some milk for you.为什么不能写成是here some milk is for you.
下面那句是中国式英语,here后面加上个名词要有个be,而be后面不能加介词