The correct answer is E. No error.
The sentence is grammatically correct. The verb “was standing” agrees with the subject “I” in number and person. The prepositional phrase “at the bus stop” modifies the verb “was standing” and tells us where I was standing. The infinitive phrase “waiting for him” modifies the verb “was standing” and tells us what I was doing while I was standing. The prepositional phrase “since eight o’clock” modifies the infinitive phrase “waiting for him” and tells us how long I had been waiting.
Here is a breakdown of each option:
- Option A: “I was standing” is the correct verb form to use with the subject “I.”
- Option B: “at the bus stop” is a prepositional phrase that modifies the verb “was standing.”
- Option C: “waiting for him” is an infinitive phrase that modifies the verb “was standing.”
- Option D: “since eight o’clock” is a prepositional phrase that modifies the infinitive phrase “waiting for him.”
- Option E: “No error” is the correct answer because the sentence is grammatically correct.