The following sentence has been split into four segments. Identify the segment that contains a grammatical error. The workers had been repairing / the mall road in / town for / several days now

Explanation

The segment that contains a grammatical error is (3) The workers had been repairing. The use of “had been” depicts the usage of a past perfect continuous tense, which is used to describe an action that was ongoing before another past action or time reference. But, the phrase “several days now” implies a present time frame, so the correct tense should be “have been repairing” to indicate the present perfect continuous tense. The other segments are grammatically correct.