Question

My dad ________ smoking in the garage. has had had been

Answer 1

My dad had been smoking in the garage.

• The sentence mentioned in the question has the continuous form of the main verb 'smoking'.
• Hence, the sentence can be either in the present continuous, past continuous, present perfect continuous or past perfect continuous form only.
• In the options, 'had been' option is present which will convert the sentence into the past perfect continuous form, hence it is the correct option.
• Other options, such as had is not correct because we cannot use had with the continuous form without 'been' in between.