1. choose the correct present progressive tense conjugation of the verb between parentheses.

ella (practicar) tenis.

estando practicar
esta practicando
esta practico
esta practiquendo

2. choose the correct present progressive tense conjugation of the verb between parentheses.

yo (esconder) mis notas.

estando esconder
estoy escondo
estoy escondando
estoy escondiendo

3. choose the correct present progressive tense conjugation of the verb between parentheses.

nosotros (escribir) un cuento.

estamos escribiendo
estamos escribimos
estando escribiendo
estamos escribano

4. decide if the following sentence is grammatically correct or incorrect.

manana tengo que trabajar temprano.

correct or incorrect.

5. choose the correct conjugation of the verb between parentheses.

todos los dias yo (vender) por lo menos diez vestidos.

vendes
vendiste
vendi
vendo

6. choose the correct conjugation of the verb between parentheses.

yo siempre (contestar) todas las preguntas.

contesta
contesto
contesta (a has an accent mark)

7. decide if the following sentence is grammatically correct or incorrect.

el cuarto de mi hermanito hoy esta limpio, generalmente esta un poco sucio.

co

The present progressive, also called the present continuous tense, is used when talking about actions that are happening now. This tense is often formed with the verb estar plus the present participle.

So Spanish present participles end in ndo (equivalent of the English ending ing)

So está is the conjugation of the verb estar for the third person singular in the simple present and participando (participating) comes from the verb participar (to participate)

As we said above, the present progressive is often formed with the verb estar plus the present participle, that is:

estar + present participle

In this way, estoy is the conjugation of the verb estar for the first person singular in the simple present. So the verb that comes after this verb needs to be in the present progressive, that is, ending in ndo. That's the case of escondiendo (hiding) that comes from esconder (to hide).

nosotros is the subject pronoun for the first person plural, which is we in English. So the conjugation of the verb estar that matches the first person plural is estamos. On the other hand, the verb that comes after this verb needs to be in the present progressive, that is, ending in ndo. That's the case of escribiendo (writing) that comes from escribir (to write).

This sentence is incorrect because of the word manana. The correct word is mañana that translates into tomorrow. So this word stands with the letter ñ, which is the fifteenth letter of the Spanish alphabet whose name is eñe. The rest of the sentence is correct. For instance, tengo is the conjugation of the verb tener in the simple present and trabajar is a verb given in infinitive form.

Vendo is the conjugation of the verb vender (to sell) for the first person singular (yo - I in English) in the simple present. The simple present tense is used to talk about habitual actions or routines. This tense is also used to describe things that happen now or in the near future. So in this sentence I am saying that is a routine to sell at least ten dresses per day.

Contesto is the conjugation of the verb contestar (to answer) for the first person singular in the simple present. Siempre is an adverb that translates into always and means at all times, on all occasions. So this means that is a routine to answer questions, that is, I always answer all the questions.  

Why is this sentence incorrect?  The word esta doesn't have an accent mark. The correct word is está. This word represents the conjugation of the verb estar for the third person singular in the simple present. The rest of the sentence is correct. So the correct sentence would be:

El cuarto de mi hermanito hoy está limpio, generalmente está un poco sucio.