Cómo se forma el presente contínuo

Se forma el presente contínuo:

Afirmativo: Subject + el verbo to be + present participle (verbo + ing)

Ejemplo: I am reading.

Negativo: Subject + el verbo to be en forma negativa + present participle (verbo + ing)

Ejemplo: I'm not reading.

Interrogativo: El verbo to be + subject + present participle

Ejemplo: Is he reading?

El verbo to be:

I am = I'm/I am not = I'm not

You are = You're/You are not = You're not

He is = He's/He is not = He isn't

She is = She's/She is not = She isn't

It is = It's/It is not = It isn't

We are = We're/We are not = We aren't

They are = They're/They are not = They're not

Spelling Tips (consejos)

To make the present participle add ‘ing’ :
Finish --> finishing

If the verb ends in one vowel and one consonant you need to double the consonant:
Stop --> stopping

If the verb ends in ‘e’ remove the ‘e’ before adding ‘ing’ :
Take --> taking