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 couldn't aspirate you couldn't aspirate he couldn't aspirate we couldn't aspirate you couldn't aspirate they couldn't aspirate	I couldn't be aspirating you couldn't be aspirating he couldn't be aspirating we couldn't be aspirating you couldn't be aspirating they couldn't be aspirating
Perfect	V-ing perfect
I couldn't have aspirated you couldn't have aspirated he couldn't have aspirated we couldn't have aspirated you couldn't have aspirated they couldn't have aspirated	I couldn't have been aspirating you couldn't have been aspirating he couldn't have been aspirating we couldn't have been aspirating you couldn't have been aspirating they couldn't 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
couldn't I aspirate? couldn't you aspirate? couldn't he aspirate? couldn't we aspirate? couldn't you aspirate? couldn't they aspirate?	couldn't I be aspirating? couldn't you be aspirating? couldn't he be aspirating? couldn't we be aspirating? couldn't you be aspirating? couldn't they be aspirating?
Perfect	V-ing perfect
couldn't I have aspirated? couldn't you have aspirated? couldn't he have aspirated? couldn't we have aspirated? couldn't you have aspirated? couldn't they have aspirated?	couldn't I have been aspirating? couldn't you have been aspirating? couldn't he have been aspirating? couldn't we have been aspirating? couldn't you have been aspirating? couldn't they have been aspirating?