In Present progressive^x, Regards^x, Present perfect^x

1) I see no significant difference between your two sentences whether with live, work, or study. I would not assume anything with regard to English vocabulary and grammar! 2) To start with, I would say ... during the past ten years. The second version (with the progressive tense) mixes...

Technically, there are two tenses: Present (or Non-Past) and Past. There are four aspects derived from two aspect pairs (simple vs. perfect and simple vs. progressive): Simple, Perfect, Progressive, and Perfect Progressive Combining these gives eight tense-aspect combinations, sometimes...