Before we start, we want you to know:

The blog was created thinking in a group of students of intermediate level in English, who are in fourth semester in English Language. The students have already learnt other tenses such as simple present, simple past, present perfect, among others. Also, they already know the correct structure of present perfect to make affirmative, negative and interrogative sentences and some regular and irregular verbs in past participle. In order to have a better understanding of past perfect tense it is necessary to have that previous knowledge. But if you just want to have a general idea about what past perfect tense is you are welcome anyway.