If we (work) all night, we (finish) in time; but we have no intention of doing it.
Should you com late, they (not let) you in.
He might get rid of his cough if he (not smoke) so much.
He always says hello if he (see) you
I (warn) you if I had seen you last week
Shout if you (see) anything unsually
If we (work) all night, we (will finish) in time; but we have no intention of doing it.
Should you com late, they (will not let) you in.
He might get rid of his cough if he (did not smoke) so much.
He always says hello if he (sees) you
I (would have warned) you if I had seen you last week
Shout if you (see) anything unsually
had worked / would have finished
won't let
didn't smoke
sees
would have warned
see