To form the perfect tense, you need the correct person of the verb haber (to have) plus the past participle. The past participle is a word that often ends in ‘-ed’ in English like ‘played ...

In the methods section one would use past tense due to what they have done was in the past. It has been debated whether one should use active or passive voice. The scientific journal Nature states ...

The following chart explains how you can conjugate this verb in the present tense. They are hungry. In English we have many different verb tenses, but the most common one you will use besides the ...

The voice of the verb is distinct from its tense. Don't confuse the passive voice with the past tense ... putting the emphasis on the discipline of communication as I intended. I could say that "In ...