Changes within the verb stem in the present tense

Please, be aware that under some conditions there are changes within the verb stem in the present tense.
These changes follow certain patterns:

1. “e“ turns into “i“
    
   
   💡 For example:
   repetir – to repeat repito, repites, repite, repetimos, repetís, repiten

   Follow this pattern and build the present tense for the verbs:
   pedir – to ask for, to order
   reír – to laugh

2. “e“ turns into “ie“
    
   
   💡 For example:
   pensar – to think
   pienso, piensas, piensa, pensamos, pensáis, piensan

   Now, let's have some fun and build the present tense for the verb “divertir-se” (to have fun) following the pattern above.

3. “o“ changes to “ue“
    
   
   💡 For example:
   dormir – to sleep
   duermo, duermes, duerme, dormimos, dormís, duermen

   Follow this pattern and build the present tense for the verbs:
   costar – to cost
   mostrar – to show

4. Verbs ending in “-uir”, add “y”
    
   
   💡 For example:
   concluir – to finish, to conclude
   concluyo, concluyes, concluye, concluimos, concluís, concluyen
 

5. The first person singular is built with “-zco”
   

   Verbs ending in „-acer, -ecer, -ocer, -ucir“ build the first person singular with the ending “-zco”.
   The rest follows the general rule that you already know by heart.

   💡 For example:
   conocer – to know
   conozco – I know
   conoces – you know, ...

   It's your time to shine:
   Follow the pattern and build the present tense for the verbs:
   traducir – to translate
   ofrecer – to offer