I would like to know how many tenses are there in English?. I don't know why but for me it's very difficult to understand about the tenses and all the changes I have to make in order to have a good structure of sentences when speaking. I believe that speaking isn't my real problem, the thing is that when I have to get into the grammar stuff I got confuse very easy. Many times, when talking or reading I notice that there is something wrong but I cannot explain what is it, to me sounds wrong, but how can I say what's wrong?... I would like to know about how many tenses are there in English?.