I got a problem with grammar, I need your help , see blow.
a. I found there is a mistake
b. I found there was a mistake
what's the difference between a and b ?
how did you know I was here ? ( why instead of "how did you know I am here ? " because the speaker is here at the monment, it's true! should be " I am here" instead of " I was here")
what does it mean by " don't let nobody touch it , that is my favorite radio"? ( should be " don't let anybody touch it " )