I like ice cream (прямая)
She said (that) she liked ice cream. (косвенная)
I am living in London
She said (that) she was living in London.
I bought a car
She said (that) she had bought a car OR She said (that) she bought a car.
I was walking along the street
She said (that) she had been walking along the street.
I haven't seen Julie
She said (that) she hadn't seen Julie.
I had taken English lessons before
She said (that) she had taken English lessons before.
I'll see you later
She said (that) she would see me later.
I would help, but...
She said (that) she would help but...
I can speak perfect English
She said (that) she could speak perfect English.
I could swim when I was four
She said (that) she could swim when she was four.
I shall come later
She said (that) she would come later.
I should call my mother
She said (that) she should call her mother
I might be late
She said (that) she might be late
I must study at the weekend
She said (that) she must study at the weekend OR She said she had to study at the weekend