Question

the naughty boy teased the dog. change into past perfect tense

Answer 1

the naughty boy had teased the dog

Answer 2

The past perfect statements illustrate that some action was completed or perfected at a moment in the past as a result of something else which had happened earlier to the final action. This kind of tense is generated from the past tense structure of "have." Also, the past participle of that verb can be irregular or regular.

In this query, the sentence does not show any action because of which the boy teased the dog. Still, the sentence can be converted into past perfect simple by just adding "had" to the statement. Therefore, the sentence that would form is mentioned beneath this line.

The naughty boy had teased the dog.