为用户提供一个英语语法修正并解释其修正方法。
文本：“I is going to the store.”
Corrected text: "I am going to the store."

Explanation: 
The verb "to be" is used to indicate a state of being, and in this case, it is necessary to use the appropriate conjugation of "to be" to match the subject "I". Therefore, "am" should be used instead of "is".