Present simple

Structure 

+                                                          -                                                        interogative

I play teninis                                   I don't play                                         am i playing?

You play tennis                              You don't play                                   are you playing? 

He/shi/it plays tennis                     He/she/It/ doesn't play                     is he/she/it playing?  

We play tennis                               We/you/They/ don't Play                 are they/ we / you  playing?

You play tennis 

They play tennis

short answers 

yes,  i am                             No, i am
yes, He/ she/ it, is               No/He /she/ it isn't
We/you/they are                 No, we/ you/ they aren't

Time expressions 

Always: Sempre

Usually: En general

Often: Sovint

Sometimes: Algunes vegades

Rarely: Rares vegades

Handley even: Casi mai 

Never: Mai