We use since with a point in time in the past. For refers to periods of time, e.g. 3 years, 4 hours, ages, a long time, months, years. They’ve lived in Oxford since 2004. Since refers to a previous point in time.
Also question is, can we use since morning?
Since is used with the present perfect tense to say when something began. It has been raining since morning. I have been waiting for his call since yesterday. She has been waiting for the parcel since last week.
Similarly one may ask, can we use since with past simple?
Since and tenses
When since introduces an action or event at a point of time in the past, we can use the past simple or present perfect after since and the present perfect in the main clause: They haven’t received any junk mail since they moved house.
Can we use since with yesterday?
Since yesterday is correct.
What do you use with since?
We use the Past tense after “since” when we refer to a point in time in the past, and we use the Present Perfect after “since” when we refer to a period of time from the past until the present.
What is for used for?
For: purpose
We use for to talk about a purpose or a reason for something: I’m going for some breakfast. I’m really hungry.
What’s the difference between for and since?
Remember, for is used with a period of time. Since is used to refer to a specific point in time. You can use for and since with similar verb tenses, if you wish.