Confusing verb pairs- 'Borrow' and 'Lend'

source: Learn English with Let's Talk 2013年12月13日
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#1
--Mary lent $1500 to John . Mary lent John $1500.
--Bill borrowed $150 from Anne.
#2
--Michelle often lends his car to Victor.
--Michelle often lends Victor her car.
--Victor often borrows Michelle's car.
#3
--May I borrow your book?
--Of course. I'll be happy to lend it to you.
--Of course. I'll be happy to lend you my book.