For the verb componer in the present tu form is Compone. But in the preterito it's compuso.

Question

Is the ending -puso because the verb as poner in it which is irregular?

Also, would this be the case for all verbs that have endings that are irregular?

Answer 1

Yes for verbs ending with poner, but compone/compuso is not the tu' form of the verb. It goes with Ud./el/ella.

I can't say for certain if the same rule applied to all irregular verbs with identical endings.

SraJMcGin may post an answer to that later.

Answer 2

Yes, the verb componer follows the pattern for poner, exactly, just with the prefix "com" there.

Present tense:
poner = pongo, pones, pone, ponemos, ponéis, ponen

compouer = compongo, compones, compone, componemos, componéis, componen

Preterit tense:
poner = puse, pusiste, puso, pusimos, pusisteis, pusieron

componer = compuse, compusiste, compuso, compusimos, compusisteis, compusieron

Sra