Uses of For, Since and Ago
For, since and ago are used to talk about time.
For is used to indicate a period of time. It is often used with the Present Perfect.
Since is used to refer to the starting point of actions of situations. It is generally used with the present perfect.
Ago is used to say when past events happened, going back from today towards the past. The verb is in the Past Tense. Follow the list;
