The abstract is usually in the past tense due to it showing what has already been studied. Example: “This study was conducted at the ... It can be beneficial to use passive when one wants to keep a ...

For example: I choose - I chose They build - they built She swims - she swam It’s also important to make sure you use the right word for the past tense of the verb 'to be'. Use 'was' when you ...

The voice of the verb is distinct from its tense. Don't confuse the passive ... When is it appropriate to use the passive voice? As I said above, it is appropriate to use the passive voice when it ...