A doubt about English grammar.
I've been reading a book called "Rich Dad Poor Dad", There's a part which says "The other Dad forbade those words to be used. He insisted I say, "How can I afford it?".
Why was "I Say" used in this? I thought that the right one would be "I said", in the past tense. Which part of English grammar can I study to learn this further?
Thanks for your help.
Ps: Se puder explicar em português seria legal também, porque eu juro que não entendi essa frase.