Write the correct form. I ... to go to the park with my friend. (to decide)

Let's analyze the sentence. The context implies a future action, and the verb "decide" is provided in parentheses, suggesting it needs to be transformed into the correct form. The correct form here is "am going to decide". This is because the speaker is expressing a decision or plan. \"I am going to decide to go to the park with my friend.\"
Therefore, the sentence would be: \"I am going to decide to go to the park with my friend.\"
Alternatively, it could be \"I have decided to go to the park with my friend.\"
Answer: I have decided