It's impossible for many people to buy what they see advertised.
Many people find it impossible to buy what they see advertised.
Parents spoil their children, because they buy lots of unnecessary things.
If parents didn't spoil their children, they wouldn't have to buy lots of unnecessary things.
E se me pudessem ajudar nesta em que temos de juntar duas frases com os pronomes relativos:
Rebecca talked to a bank manager. He won't give her any credit card.
The bank manager, who talked to Rebecca, won't give her any credit card.