Used for actions that happened in the past.

Used for actions that is currently going or currently exists.

Used for actions that has not yet happened and is expected to happen in the future.

Shows action that was happening at a specific time in the past

Shows an action happening now.

Shows an action that will be happening at specific time in the future.

Shows an action which happened before another action was completed.

Tells action that happened or did not happen in the past but continues to present.

To show action which will be completed before another future action happens.

Shows an action that was ongoing in the past before another another past event.

Shows an action that started in the past and is still happening now.

Shows an action that will have been continuing up to a point in the future.