$\textrm{If I were you, I would give up the job.}$
$\textrm{→I suggest you should give up the job.}$
$\textrm{He started learning Korean when he was ten. He was still learning it.}$
$\textrm{→He has learnt/ learned Korean when he was ten. He was still learning it.}$
$\textrm{That factory is producing more and more air pollution.}$
$\textrm{→More and more air pollution are being produced by that factory.}$
$\textrm{Although he earns a small salary, he is happy.}$
$\textrm{→In spite of earning a small salary, he is happy.}$