In Present simple^x, Definite articles^x, Grammar^x

Hi all!I've been giving English conversation lessons to a theology professor for about a year now. He's getting on in the years - a couple years from retirement - and his primary goal has been just to get his spoken English going a little stronger. His mother tongue is French but he's...

There are twelve tenses in English grammar. Do we have to use the definite article "the"for each tense or not? Can you give me some explanations,please?In the below examples, Do we have to use "the" or not?1.In the use of the Present Simple.2.The Present Perfect Tense or Present Perfect...