Question

Even though I _______ for three years, I had no idea that I could beat somebody in the ring.

have been boxing

was boxing

had been boxing

had boxed​

Answer 1

Even though I had been boxing for three years, I had no idea that I could beat somebody in the ring.

Explanation:

• I had been boxing (option C) is the correct answer for the given sentence.

• 'Had been +V1-ing' is used in the places of past perfect continuous tense.

• Past Perfect Continuous tense is used in the places where an action started before a particular time in the past but was still in progress up to that time in the past.

• The given sentence indicates the rule of past perfect continuous tense. this action happened in the past, and the continuous action in the past is explained.

Answer 2

Even though I had been boxing for three years, I had no idea that I could beat somebody in the ring.

• The given sentence is an example of past perfect continuous tense. This is because it is stating an idea (boxing) that had started in the past and continued for a particular span of time (three years).
• The structure of the sentence must include the base form of the main verb (boxing) and an auxiliary verb (had been).
• So, the correct choice is option (c) had been boxing.