поставьте глагол сказуемое во все временные формы группы perfect произведя все необходимые смысловые изменеия Greek civilization

Present Perfect: Greek civilization have flourished until now.

Present Perfect Continuous: Greek civilization have been flourishing for twenty centuries.

Past Perfect: Greek civilization had flourished before 330 BC.

Past Perfect Continuous: Greek civilization had been flourishing from 700 BC to 330 BC.

Future Perfect: Greek civilization will have flourished by the end of 2050.

Future Perfect Continuous: By the end of 2050 Greek civilization will have been flourishing for 10 years.