____ you ever been to Amsterdam?

The correct auxiliary verb to complete the sentence “____ you ever been to Amsterdam?” is “Have.” This sentence structure is an example of the present perfect tense, which is used to talk about experiences that happened at some unspecified time in the past and are relevant to the present. The present perfect tense is formed with the auxiliary verb “have” or “has” followed by the past participle of the main verb.

• For the pronoun “you,” the correct form of the auxiliary verb is “have.” The structure is “Have + subject + ever + past participle.” In this case, “been” is the past participle of the verb “to be.”
• Option A, “Do,” is incorrect because “do” is used for the simple present tense (e.g., “Do you go to Amsterdam?”) or to form questions with other verbs in the simple present, not with the past participle “been.”
• Option B, “Has,” is incorrect because “has” is used with third-person singular subjects (he, she, it) in the present perfect tense (e.g., “Has he ever been to Amsterdam?”). It is not used with “you.”
• Option D, “Did,” is incorrect because “did” is used for the simple past tense (e.g., “Did you go to Amsterdam yesterday?”) and is followed by the base form of the verb, not the past participle “been.”