Part 1.
Number 1. Nosotros.
Number 2. Ellas.
Number 3. Ella.
Number 4. Tu.
You are using "SER" which is the to be. I have to go but I wish I can help with the second. Bye!
 
        
             
        
        
        
The main idea is how it tells us the different types of holidays that are celebrated in mexico.
personality enthusiastic.
i celebrate all these holidays almost the same ways but slightly different.
        
                    
             
        
        
        
Answer:
I guess something really bad is happening and we still in 2020.
 
        
                    
             
        
        
        
Answer:
1) Ricardo no conoce a ningún chico que estudie medicina.
2) Laura y Diego no cuidan a ningún perro que proteja su casa.
3) Maribel y Lina no tienen ningún pariente que escriba poemas.
4) Los González no usan ningún coche que sea barato.
5) Mi prima no trabaja con personas que conozcan a su padre.
6) Gregorio no hace ningún plato venezolano que sea delicioso.
Explanation:
These are cases of denial of the present tense of the subjunctive.
We will use this tense as a form of the imperative or can also be used in subordinate sentences.
We can use it for the following situations:
- To assume something negatively through a present or future probability.
- For hypothetical situations or present or future consequences.
- To demonstrate present or future probabilities
- To give a negative order.
Then I will write how to conjugate a regular verb in Spanish in the present subjunctive:
Verbs ending in –AR
They are exchanged for these endings:
Yo:   -e
Tú:  -es
Él / ella: -e
Nosotros/as : -emos
Vosotros: -éis
Ellos/ as : -en
Verbs ending in –ER  and -IR
They are exchanged for these endings:
Yo: -a
Tú: -as
Él / ella: -a
Nosotros/as : -amos
Vosotros: -áis  
Ellos/ as : -an