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Spanish Verbs - Compound Tense

Compound tenses are formed with the verb "Haber" in various tenses + the Past Participle. 

The Past participle is formed through the next steps: 

     1.-  Eliminate the -ar, -ir or -er ending of the verb. 

     2.-  If the verb ends in -ar replace it with -ado
           If ends with -er or -ir, replace it with -ido.     
           If it is an irregular verb replace with -to, -so or -cho.



The imperative mood is formed following different rules for each person. Note that the following pattern shows the whole verb and that in order to make the endings clear, they have been underlined.