Holy Abode of Debauchery. English version

But how must this conversation be correct??? Probably if I would need to know time I shall ask and answer it also... In my opinion it is not possible to learn to speak informal language if you live not in english speaking society! Anybody should not even try... Any schools won't help! For example the phrase "rain pour like from a bucket" they tell "it rains cats and dogs". How can a russian human say it even if he knows all words???

P. S. It is better to say For example the phrase "rain pour like from a bucket" is told by them as "it rains cats and dogs" certainly...