* Subject: "Your dog" is the subject of the sentence, meaning it is the one performing the action.
* Verb: "Jumped" is the past tense verb, indicating an action that already happened.
* Problem: "Open" is in the present tense, which doesn't match the past tense of "jumped."
To fix it:
You have two options, depending on the meaning you want to convey:
1. Past Tense: "Your dog jumped up and down when you opened the door." This sentence implies the dog's action happened in the past, and you opened the door in the past as well.
2. Present Tense: "Your dog jumps up and down when you open the door." This sentence implies that this is a regular occurrence. Every time you open the door, the dog jumps.
Choose the option that best reflects the intended meaning of the sentence.