For an example conjugation of the final vowel being replaced by “d”, we will use the verb tener. Drop the final vowel, replace it with “d” and the verb becomes tendr. For an example of dropping the final vowel with no replacement we will use querer.

It will conjugate to querr. We will use hacer for an example of the conjugation dropping the ce/ec. It will conjugate to har.

Then, taking it a step farther, we will conjugate these verbs into the “yo”, “tú”, and “el/ella” forms from their conjugations. Tendr will become tendré in the “yo” form, querr will become querrás in the tú form, and har will become hará in the “el/ella” form.