so I choose to use the past simple passive. But their injuries are still evident at the present time, so I could have used the present perfect passive. There are no time phrases in this example to ...

The clauses above bear examples of a common verb tense: the present perfect continuous. This is the tense that indicates an action that started in the past and continues now. While the present ...

One’s tense will vary depending on what one is trying to convey within their paper or section of their paper. For example, the tense may change between the methods section and the discussion section.