Question

The servant ------ the room before the master came .(had cleaned/has cleaned)

Answer 1

The blank filled with the correct option along with the explanation is given below:

The servant had cleaned the room before the master came.

Explanation

Past Perfect Tense is used to refer to an action that happened before another action in the past. In this sentence the servant ‘had cleaned’ the room before the ‘master came’. There were two actions. Cleaning by the servant happened first; coming of master happened after the cleaning. So, we used the past perfect.   

 

Answer 2

The answer of your question is " had cleaned"
This is because the sentence illustrating that it's a past perfect tense as it is expressing that some action happen in the past and before something. And in the past perfect tense we generally use the "Had" to express past with the third form of verb . This is why in the corrected sentence we are using "Had cleaned"
The full sentence will be like that " The servant had cleaned the room before the master came"