Which sentence is corret?

Re: 1)My mom has been working ever since I can remember.
2) My mom has been working ever since I could remember.

Sentence 1 is correct. Sentence 2 has the implication that you are unable to remember anything at the present moment and have to rely on the/a time that you COULD remember.

Hello, Guest,
sentence 2 would look better if you wrote:
My mom haD been working ever since I could remember.
Then you'd be talking about the past.

Er ... no. Definitely not the past perfect.

The problem in both sentences is the "ever since." It would be better to say "My mom has been working for as long as I can remember."

Skater

#1 is fine

I think so too, though it would be better expressed as Skater says.
My mom has been working ever since...When?
> since I can remember

"Since" refers back to a specific time. "For as long as" refers to a continuing period starting at a specific time and continuing to the present. Because remembering is a continous process, it is more natural to say "has been working for as long as I can remember." You could, however, say "has been working ever since she left school/left home/came to this country, etc." -- that is, ever since

I'm aware of that, Skater, That's what I said your sentence was better, or should I have said "more correct"?

I wasn't correcting you, I was just explaining my earlier post, which was a bit too short.

Oh, OK, no harm done!
Could we have "... for ever since I can remember"?

It's kind of you all!
You are very helpful!

A native English teacher from one publisher said:

You cannot use "could".The act of remembering takes place in the present. If it is past tense, then it implies something has been forgotten. "Since" means the action has taken place from the past to the present. "I've lived in Taipei since I was born."