Tense

Hi Guys and Girls,

I need someone with a better understanding of the English language to help me here...

I am there.

Is the above sentence possible? "Am" is a present tense verb. Present tense implies now. So I can't be there, because I am here. As a matter of fact, I will always be here, no matter where I am.

Next question: There is past tense and present tense. Can you have future tense?

Over to you (plural)...