Just some random questions

Just some random questions
 

I have a few random thoughts that I wanted to have clarified.

First. If you wanted to say "are you here" you would say "Estas aquí?" right?
If you want to say "is she here?" you'd say "Esta aquí?" for they "estan aquí"

For "how are they" would you say como estan?

And if you wanted to say, what nationality are they, would you say, for example "son cubanos"

I just want to make sure I've got my conjugations right. since every language has it's irregularities.


And since the conjugation of the verb gives away who is performing the action, in what instances do you need to put yo,
tú,ella/él/ud, nosotros, or ellos/as in front?

All your translations are correct, but most of them lack accent marks.

The third person conjugations are ambiguous. The subject pronouns should be used for them. In the imperfect tense, the 1st and 3rd person conjugations are the same, so you should add 'yo' to the list in that tense.