Affirmative
I / He / She / It + was +-ing
We / You / They + Were +-ing
Negative
I / He / She / It + was not / Was not +-ing
We / You / They + Were not / weren +-ing
Interrogative
Was + I / He / She / It + was +-ing?
Were + We / You / They + Were +-ing?
Adverbs
While- mientras
As- mientras