1.London is founded by the romans 2.London was founded by the romans 3London will be founded by the romans 4.London is being founded by the romans 5.London was being founded by the romans 6.- 7.London has been founded by the romans 8.London had been founded by the romans 9.London will have been founded by the romans  Или нужно определить какое время в примере. Если в примере, то Past Indefinite Passive