The stem of a verb is the part of the infinitive that is left after you drop the endings -ar, -er, or -ir. For example, the stem of empezar is empez-.
1. 2 SUPERSYMMETRY Most popular solution to the hierarchy problem. Symmetry between fermions, and bosons With same mass and quantum number 3.
Use the verb tener to show relationship, possession, or age, or in other expressions such as tener hambre/sueño/sed. The verb tener.
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