talk at high level/ object to lending me ; do they make sense?
I just wanted to know if theses two sentences make sense :

I must talk at high level ( meaning I must use non-basic vocabulary )

And is this correct

"Would you object to lendin g me your book? Instead of "would you object to my borrowing your book? which sounds a little strange to us.

Thanks

Question

talk at high level/ object to lending me ;  do they make sense?
I just wanted to know if theses two sentences make sense :

I must talk at high level  ( meaning  I must use non-basic vocabulary )

And    is this correct

"Would you object to lendin g me your book?   Instead of   "would you object to my borrowing your book?  which sounds a little strange to  us.

Thanks

Answer

Talking about "being strange", they are all extremely strange and unnatural.  No native speaker would say anything of the kind..

They would say,

1.  I must speak in a sophisticated way.  (This does not mean using difficult words or structures.)

2.  May I borrow your book please?

Answer

2.  It is formal.  Also, when adding 'ing' to a verb, do not add spaces.  You had it right with 'borrowing.'

Answer

1. I must speak at 'a' high level.

2. Both of your sentences here are too stiff for spoken English. How about: 'May I borrow your book, please?