The document provides examples of using different time expressions to indicate actions that started in the past and continue in the present. It shows how to express the duration of an action that began in the past using "for" and "since" by giving examples like "He has cooked for 3 hours since 12:00" or "They have driven their car since September for 1 month." It also contrasts expressions like "yesterday," "last week," and specific past dates and months with continuing present actions.