Fill in the blank with the correct option :
When Monisha reached the bus stand, the bus _____.

Question

Fill in the blank with the correct option : 
When Monisha reached the bus stand, the bus _____.

Accepted Answer

Option 2, "had already left," is the correct answer because it uses the past perfect tense correctly. The past perfect tense (had + past participle) is used to describe an action that was completed *before* another action in the past. In this sentence, Monisha's arrival at the bus stand is the second action in the past. The bus leaving is the action that happened *before* she arrived. Therefore, "had already left" accurately conveys that the bus departed before Monisha reached the bus stand.

Here's why the other options are incorrect:

*   **Option 1: was already left:** This is grammatically incorrect. The passive voice construction "was left" requires a subject that is being acted upon. In this case, the bus is the actor (leaving), not the recipient of the action. Also, "was already left" doesn't clearly establish the sequence of events as effectively as the past perfect.

*   **Option 3: already left:** While "already left" is understandable, it's grammatically incomplete in this context. It lacks the auxiliary verb "had" to form the past perfect tense, which is necessary to clearly indicate that the bus's departure happened before Monisha's arrival. Using the simple past "already left" implies a closer temporal relationship between the two events than is likely intended.

*   **Option 4: has been already left:** This uses the present perfect passive tense, which is inappropriate. The present perfect tense connects a past action to the present. Since the sentence describes two past events (Monisha arriving and the bus leaving), the present perfect is not suitable. Furthermore, the passive voice construction is incorrect for the same reason as Option 1.