English verb conjugation
COULD INTUBATE

Regular verb: intubate - intubated - intubated

Affirmation

Simple form	V-ing form
I could intubate you could intubate he could intubate we could intubate you could intubate they could intubate	I could be intubating you could be intubating he could be intubating we could be intubating you could be intubating they could be intubating
Perfect	V-ing perfect
I could have intubated you could have intubated he could have intubated we could have intubated you could have intubated they could have intubated	I could have been intubating you could have been intubating he could have been intubating we could have been intubating you could have been intubating they could have been intubating

Negation

Simple form	V-ing form
I couldn't intubate you couldn't intubate he couldn't intubate we couldn't intubate you couldn't intubate they couldn't intubate	I couldn't be intubating you couldn't be intubating he couldn't be intubating we couldn't be intubating you couldn't be intubating they couldn't be intubating
Perfect	V-ing perfect
I couldn't have intubated you couldn't have intubated he couldn't have intubated we couldn't have intubated you couldn't have intubated they couldn't have intubated	I couldn't have been intubating you couldn't have been intubating he couldn't have been intubating we couldn't have been intubating you couldn't have been intubating they couldn't have been intubating

Interrogative form

Simple form	V-ing form
could I intubate? could you intubate? could he intubate? could we intubate? could you intubate? could they intubate?	could I be intubating? could you be intubating? could he be intubating? could we be intubating? could you be intubating? could they be intubating?
Perfect	V-ing perfect
could I have intubated? could you have intubated? could he have intubated? could we have intubated? could you have intubated? could they have intubated?	could I have been intubating? could you have been intubating? could he have been intubating? could we have been intubating? could you have been intubating? could they have been intubating?

Interro-negative form

Simple form	V-ing form
couldn't I intubate? couldn't you intubate? couldn't he intubate? couldn't we intubate? couldn't you intubate? couldn't they intubate?	couldn't I be intubating? couldn't you be intubating? couldn't he be intubating? couldn't we be intubating? couldn't you be intubating? couldn't they be intubating?
Perfect	V-ing perfect
couldn't I have intubated? couldn't you have intubated? couldn't he have intubated? couldn't we have intubated? couldn't you have intubated? couldn't they have intubated?	couldn't I have been intubating? couldn't you have been intubating? couldn't he have been intubating? couldn't we have been intubating? couldn't you have been intubating? couldn't they have been intubating?