In Present simple^x, Grammar^x, Perfect progressive^x

Hi everybody,Why do all the Grammar books use the expressions "simple present" and "simple past", although all the other tenses start with the tense-marker and add the aspect-marker then: present progressive, present perfect, present perfect progressive, past progressive, past...

Hi I need urgent assistance and was wondering if you would mind providing same. Below are sentences demonstrating different tenses written in the active voice... the passive voice of most of these is pretty simple to extrapolate...or is it? Please help by providing the passive behind in each...

Hi I need urgent assistance and was wondering if you would mind providing same. Below are sentences demonstrating different tenses written in the active voice... the passive voice of most of these is pretty simple to extrapolate...or is it? Please help by providing the passive behind in each...