Spanish past tense irregulars

Everything that is not ar, eir, and ir, are called root or stem. in this case they change, this is why they are called Spanish Past stem-changing irregular verbs.  Here you have the charts of the most common irregular verbs in the past.

Here are the charts with the changes. And click here to have the notes of the explanation.Spanish past tense irregular

The chart that highlights the change 

Spanish past tense e to i

Chart with the most common ones to use in a conversation

This is a video explanation about this topic: Here is the class that is used to explain it. 

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