Ayer yo prometí llevar a mi sobrino al cine.
This sentence means - Yesterday, I promised to take my cousin to the cinema.
When it comes to the word ayer (= yesterday), you know immediately that you should use the preterite form of a verb, which in this case is prometer. For first person singular, I, that form is prometí.
I think you mean conjugation, but anyhow it depends on how you are using it..
1. Nuestro
2. Mi
3. Sus
4. ?
5. ?
6. Nuestra
I don't understant the contest of number 4 and 5.
Answer:
oxygen is a type of gas which is the most important nessicity of all the living animals .
without oxygen there is no existence of living things.oxygen plays a vital role in the earth
hope it is helpful to you ☺️