Answer: have you been learning
Explanation: The verb in the Present Perfect Continuous tense indicates an action that started in the past and is still continuing in the present. In this case, the words “Since,” “For,” and “How long” are often used in the sentence.

In the above sentence, the inclusion of “How long” indicates that it will be in the Present Perfect Continuous tense. The correct answer will be “have you been learning.”

👉Now, please provide your answer to the following question in the comments:

*The baby____since morning.

A. has been crying

B. has cried

C. cries

D. have been crying.

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