Incorrect: "I would had called you if have given me your number."
Problems:
* "Would had" is incorrect. The correct past perfect tense form is "would have".
* "Have" is incorrect. The correct tense here is the past participle "given".
Correct sentence: "I would have called you if you had given me your number."
Explanation:
* "Would have" expresses a hypothetical situation in the past.
* "Had given" is the past perfect tense, showing an action that happened before another past action (in this case, the hypothetical call).
Let me know if you have any other grammar questions!