English verb conjugation
COULD ASPIRATE

Regular verb: aspirate - aspirated - aspirated

Affirmation

Simple form	V-ing form
I could aspirate you could aspirate he could aspirate we could aspirate you could aspirate they could aspirate	I could be aspirating you could be aspirating he could be aspirating we could be aspirating you could be aspirating they could be aspirating
Perfect	V-ing perfect
I could have aspirated you could have aspirated he could have aspirated we could have aspirated you could have aspirated they could have aspirated	I could have been aspirating you could have been aspirating he could have been aspirating we could have been aspirating you could have been aspirating they could have been aspirating

Negation

Simple form	V-ing form
I could not aspirate you could not aspirate he could not aspirate we could not aspirate you could not aspirate they could not aspirate	I could not be aspirating you could not be aspirating he could not be aspirating we could not be aspirating you could not be aspirating they could not be aspirating
Perfect	V-ing perfect
I could not have aspirated you could not have aspirated he could not have aspirated we could not have aspirated you could not have aspirated they could not have aspirated	I could not have been aspirating you could not have been aspirating he could not have been aspirating we could not have been aspirating you could not have been aspirating they could not have been aspirating

Interrogative form

Simple form	V-ing form
could I aspirate? could you aspirate? could he aspirate? could we aspirate? could you aspirate? could they aspirate?	could I be aspirating? could you be aspirating? could he be aspirating? could we be aspirating? could you be aspirating? could they be aspirating?
Perfect	V-ing perfect
could I have aspirated? could you have aspirated? could he have aspirated? could we have aspirated? could you have aspirated? could they have aspirated?	could I have been aspirating? could you have been aspirating? could he have been aspirating? could we have been aspirating? could you have been aspirating? could they have been aspirating?

Interro-negative form

Simple form	V-ing form
could I not aspirate? could you not aspirate? could he not aspirate? could we not aspirate? could you not aspirate? could they not aspirate?	could I not be aspirating? could you not be aspirating? could he not be aspirating? could we not be aspirating? could you not be aspirating? could they not be aspirating?
Perfect	V-ing perfect
could I not have aspirated? could you not have aspirated? could he not have aspirated? could we not have aspirated? could you not have aspirated? could they not have aspirated?	could I not have been aspirating? could you not have been aspirating? could he not have been aspirating? could we not have been aspirating? could you not have been aspirating? could they not have been aspirating?