She’s liked him since six months.

Question

When you start work?
I’ve been knowing her for three months

i)What the mistake is.
ii) Why you think it has been made.
iii) How you would explain and correct the mistake with a student.

Answer 1

Here are the corrected sentences:

She has liked him for six months.
When do you start work?
I've known her for three months.

Now ... how will you answer the three questions for each sentence?