Multiple choice Directions: Choose the incorrect sentence. Teacher has been teaching the students for 2 hours. Teacher had been teaching the students for 2 hours. Teacher was teaching the students for 2 hours. Reveal answer Fill a bubble to check yourself C Correct answer Explanation In present perfect continuos tense we use has/have+been+present participle(verb's first form+ing) and since/for. In past perfect continuos tense we use had+been+present participle (verb's first form+ing) and since/for. So, option 3 is incorrect.