FOR, SINCE, AGO, HOW LONG …?, HOW LONG AGO …?
I. FOR A) Use: For expresses a duration that is to say a length of time during which the action took place. B) Exemplification: - I have been waiting for him for two hours or I have been waiting on him for two hours - She has worked on the project for days - He has already sent the mail to the supplier C) The tenses we use 'For' with: For is used both with the present perfect tenses and the past perfect tenses. - She had travelled to the Middle East for one month prior to getting married - She had been driving a hatchback for a few weeks when a Sports Utility Vehicle hit her D) Other uses of 'For': 1. For: in a past action Can be used to express that something happened in the past and is no longer in effect at the time of speaking. For is therefore used with a time word. I worked there for three years back in the nineties It rained for two days without letting up! He taught in high schools for thirty years before retiring 2. For: conjunction or linking word Can al...