21. explain how stem-changing -ir verbs are different from stem-changing -ar and -er verbs in the present subjunctive. (4 points)

The stem-changing _ir verbs are different from stem-changing -ar and -er verbs in the present subjunctive by a reason particularly:

- The verbs in Spanish that finish in "ntir" regularly change the previous vowel for a combination "ie" in the present subjunctive.

Examples:

1. Sentir: Sienta (subjunctive form).

2. Mentir: Mienta (subjuntive form).

Explanation:

The subjunctive form has many similarities among the verbs finished in "ar", "er" or "ir", but the case in the answer is an exception.

the gravitational force will decrease in strength

explanation:

as objects move farther apart the gravitational ring also does the same and can completely diminish if the objects get far enough apart

sé mucho española de puertorriqueña y dominicana . una reunión exitosa tiene cuatro características: 1. la reunión debe tener un propósito claro y debe atenerse a la agenda 2. la reunión debe comenzar y terminar a tiempo. 3. los participantes deben estar debidamente preparados. 4.minutos deben ser tomados. espero que esto ayude, buena suerte.