To explain grammar points - forget the terminology and rules, first focus on the situation where those concepts happen.
Begin with what students know and add new information
Use concrete instead of abstract examples
Use examples from the students immediate surroundings - school, home, community
To address the question of 'lend' and 'borrow' - observe what students lend or borrow often - like pens and pencils.
The borrower 'doesn't have' and 'wants' something.
The lender 'has' and 'gives' something.
Right away those four items make a story to tell the students. You can then ask 'concept check questions to confirm understanding.
After that, any amount of games with realia are possible - those that 'have' are lenders, those that 'don't have' are borrowers'