English tense explanations

I want to try and carry out an ......

My ..... is to explain the different uses of the tenses.

The main question is knowing where you .....?

As you ..... know there are many tenses in English.

The problem is ..... you can tell the difference

between, for ....., the Present and Present Perfect.

But I should ..... myself from talking about

particular tenses ..... I've talked about tenses in general.

Please ..... me for going on to the middle of my story

when I should be thinking about the ......