Recordemos que el verbo ser es un verbo irregular.
Answer:
Nosotros hemos descargado los programas en la red.
Los matemáticos han descubierto la fórmula revolucionaria.
La astrónoma ha observado el cometa por horas.
Usted ha realizado los avances en la investigación.
La ingeniera ha patentado el descubrimiento.
Tú has enviado el correo electrónico.
Explanation:
Answer:
Pretérito perfecto simple:
1. Nosotros descargamos programas en la red.
2. Los matemáticos descubrieron una fórmula revolucionaria.
3. La astrónoma observe el cometa durante horas.
4. Usted realice avances en la invertigación.
5. La ingeniera patentó el descubrimiento.
Explanation:
PRETERITO PERFECTO SIMPLE
The preterite tense is used to talk about actions that took place in the past and has no relation to the present.
The past perfect simple or past tense is formed based on the root of the verb (infinitive minus -ar, -er, or -ir) and adding the following disinherities:
* Verbs of the first conjugation (ending in -ar): -é, -aste, -ó, -amos, asteis, -aron * Verbs of the second and third conjugation (ending in -er or -ir): -í, -iste, -ió, -imos, -isteis, -ieron
Answer:
vajilla
escultor
estatua
arte
pincel
pintor
pinturas
a través de
abstracto
Explanation:
Hacer is the infinitive meaning "to do," "to make," or "to take."
Hacer la tarea. - "To do homework."
Hacer la cama. - "To make the bed."
Hacer un viaje. - "To take a trip."
Hacer ejercicios. - "To do exercises."
I hope this helps! (:
Answer:
The lids should not be put back on the waste containers because the reaction waste is still generating hydrogen gas that would get trapped in the container.
Explanation:
Camphor is reduced to isoborneol by dissolving camphor in ethanol in erlenmeyer flask. This reaction is followed by addition of excess sodium borohydride in small portions. The reaction mixture is left for 10 minutes and heat is then applied to the reacting mixture. Therefore for safety purpose, during heating, the lids should not be put back on the waste containers because the reaction waste is still generating hydrogen gas that would get trapped in the container.
The reacting mixture is then poured into a beaker of ice water afterwards and Vacuum filtration and blotting dry is used to collect the precipitate instead.
I think this is right I am not sure but try it
Mi hermano tener un alumno en la misma escuela que yo. Pero él ser)tener menor que yo. Él ser trece años.