Student or Learner
I've done one excercise which asked to fill the blanks with "since" or "for".
For the below sentence the correct answer is "for" whereas "since" is considered false:
I've had this car ___ a month.
But couldn't we write also "I've had this car since a month" meaning that the starting point of the possession of the car was a month ago?
I've had this car for a month.
I've had this car for a year.
I've had this car for a week.
I've had this car since March.
I've had this car since March 7th.
I've had this car since I was 16.
I've had this car since the beginning of the year.
I've had this car since mid-March.
I've had this car since 2012.
I've had this car since yesterday.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Thank you, I have noted them.
And would "I've had this car since a month ago?" be correct?
It's unnatural. Why not stick to the many alternatives you know are correct?
For + time period
Since + time point.
I am not a teacher.
There was a correction ems made to your post, and I'm not sure you noticed it.
Facts can be true or false.
Grammar can be correct or incorrect.
If you got the car a month ago, then writing "since a month" will still be true, even if it's not correctly written.
If you got the car a year ago, then writing "a month ago" will be false, even though it's correctly written.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.