Russian soldiers are in Ukraine.
Russia is invading Ukraine
Russia has invaded Ukraine
Present Perfect Continuous
Russia has been invading Ukraine since March.
Putin admitted he sent Russian soldiers to Crimea before the Annexation.
Putin was lying when he said there were no Russian soldiers in Crimea.
Russian soldiers had been in Crimea since mid February.
Past Perfect Continuous
Putin had been lying about Crimea the whole time.
Putin will admit that Russian soldiers are in Donbas in the near future.
Ukraine will be fighting against Russia until Putin is gone.
Ukrainians will have killed many Russian soldiers in Donbas by the end of this month.
Future Perfect Continuous
By the time he is held accountable, Putin will have been lying about his invasions for years.
For students of English, here is some practice with tenses