Question

When is it generally accepted to switch verb tenses mid-sentence?

Answer 1

It is only generally accepted to use different verb tenses when writing it in mid-sentence is the events that you want to show or describe did not happen at the same time. This would clearly show the difference in the time on when the events occurred. The answer would be option B.

Answer 2

Gradpoint-  

when you want to show that events did not occur at the same time