English verb conjugation
COULD INTUBATE

Regular verb: intubate - intubated - intubated

Affirmation

Simple form	V-ing form
I could intubate you could intubate she could intubate we could intubate you could intubate they could intubate	I could be intubating you could be intubating she 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 she 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 she 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 she 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 she 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 she 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 she 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 she intubate? could we intubate? could you intubate? could they intubate?	could I be intubating? could you be intubating? could she 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 she 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 she 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 she 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 she 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 she 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 she have been intubating? couldn't we have been intubating? couldn't you have been intubating? couldn't they have been intubating?