1. The voice of the verb is distinct from its tense. Don't confuse the passive voice with the past tense. (Sentence 2 happens to be in the past tense, but 3 is not; both 2 and 3 are in the passive ...

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 ...

Abdul Weli from Somalia writes: I would like to know more about the passive. Most reference books say that the present perfect continuous tense has no passive form. Yet, at the same time ...