Nosotros __________ al lado de un lago.

vivimos
vivemos
vivir
viven

¡_______ la mesa!
Pongo

Ponga

Pone

Pon

¡_______ las ventanas!
Limpia

Limpian

Limpias

Limpiar

Which would be true for forming an informal command?
You use the infinitive of the verb.

You just need to change the tone of your voice.

You use the formal (Ud.) form of the verb.

You use the informal (tú) form of the verb.

1. Vivimos

2. Ponga
3. Limpiar
4. You use the informal (tú) form of the verb.
(I'm confident that the first three are correct, but I'm not sure about the fourth one)

Agree with all except 3. It looks like a command, which does not take the infinitive.

To answer the first question, "Nosotros ________ al lado de un lago," the correct answer is "vivimos."

To know the correct answer, you need to conjugate the verb "vivir" in the present tense for the pronoun "nosotros." The verb "vivir" means "to live," and in Spanish, you change the verb form depending on the subject.

So, to form the verb "vivir" for "nosotros" (we), you drop the -ir ending and add -imos, resulting in "vivimos." Therefore, the correct answer is "vivimos."

Moving on to the second question, "¡_______ la mesa!" The correct answer is "Pon."

To determine the correct answer, you need to conjugate the verb "poner" in the informal command form for the pronoun "tú." The verb "poner" means "to put" or "to place."

In Spanish, to give informal commands, you use the third-person singular form of the verb, which in this case is "pon," without the -er ending.

So, the correct answer is "Pon."

Finally, for the last question, "¡_______ las ventanas!" The correct answer is "Limpia."

To find the correct answer, you need to conjugate the verb "limpiar" in the informal command form for the pronoun "tú." The verb "limpiar" means "to clean."

Again, in Spanish, for the informal command form, you use the third-person singular form of the verb, which in this case is "limpia," without the -ar ending.

So, the correct answer is "Limpia."

Therefore, to summarize, the correct answer for forming an informal command is: "You use the informal (tú) form of the verb."