Why not "used to walk"?
Because रहे is a participle (continuous tense). "Used to walk" would be: "चलते थे".
I think this should be taught grammer first
I answered in a singular form and it was rejected. Was it because you have to pay respect even if you don't respect your grandfather?
I didn't get
What is the difference between था and थे
था is used for singular masculine whereas थे is used for plural......
For extra knowledge- थी is used for singular feminine