For   Since    Ago

For Since Ago

We use for and since to say HOW LONG We use ago as a time word to say WHEN

Preposition - "Since"

Preposition – “Since”

Since can indicate a specific point in time when an action began or an event occurred. Example: I have been working at this company since 2010.

The Past Perfect Continuous tense

The Past Perfect Continuous tense

The Past Perfect Continuous tense is used to describe an action that started in the past and continued up until another point in the past. It emphasizes the duration of the action and often suggests that the action was ongoing and unfinished at the time of the past event.

The Past Perfect tense

The Past Perfect tense

In the Past perfect tense, the auxiliary verb had is used with the past participle form of the verb to indicate that the action was completed before a past action or time.