English verb conjugation
COULD BREATHALYSE

Regular verb: breathalyse - breathalysed - breathalysed

Affirmation

Simple form	V-ing form
I could breathalyse you could breathalyse she could breathalyse we could breathalyse you could breathalyse they could breathalyse	I could be breathalysing you could be breathalysing she could be breathalysing we could be breathalysing you could be breathalysing they could be breathalysing
Perfect	V-ing perfect
I could have breathalysed you could have breathalysed she could have breathalysed we could have breathalysed you could have breathalysed they could have breathalysed	I could have been breathalysing you could have been breathalysing she could have been breathalysing we could have been breathalysing you could have been breathalysing they could have been breathalysing

Negation

Simple form	V-ing form
I couldn't breathalyse you couldn't breathalyse she couldn't breathalyse we couldn't breathalyse you couldn't breathalyse they couldn't breathalyse	I couldn't be breathalysing you couldn't be breathalysing she couldn't be breathalysing we couldn't be breathalysing you couldn't be breathalysing they couldn't be breathalysing
Perfect	V-ing perfect
I couldn't have breathalysed you couldn't have breathalysed she couldn't have breathalysed we couldn't have breathalysed you couldn't have breathalysed they couldn't have breathalysed	I couldn't have been breathalysing you couldn't have been breathalysing she couldn't have been breathalysing we couldn't have been breathalysing you couldn't have been breathalysing they couldn't have been breathalysing

Interrogative form

Simple form	V-ing form
could I breathalyse? could you breathalyse? could she breathalyse? could we breathalyse? could you breathalyse? could they breathalyse?	could I be breathalysing? could you be breathalysing? could she be breathalysing? could we be breathalysing? could you be breathalysing? could they be breathalysing?
Perfect	V-ing perfect
could I have breathalysed? could you have breathalysed? could she have breathalysed? could we have breathalysed? could you have breathalysed? could they have breathalysed?	could I have been breathalysing? could you have been breathalysing? could she have been breathalysing? could we have been breathalysing? could you have been breathalysing? could they have been breathalysing?

Interro-negative form

Simple form	V-ing form
couldn't I breathalyse? couldn't you breathalyse? couldn't she breathalyse? couldn't we breathalyse? couldn't you breathalyse? couldn't they breathalyse?	couldn't I be breathalysing? couldn't you be breathalysing? couldn't she be breathalysing? couldn't we be breathalysing? couldn't you be breathalysing? couldn't they be breathalysing?
Perfect	V-ing perfect
couldn't I have breathalysed? couldn't you have breathalysed? couldn't she have breathalysed? couldn't we have breathalysed? couldn't you have breathalysed? couldn't they have breathalysed?	couldn't I have been breathalysing? couldn't you have been breathalysing? couldn't she have been breathalysing? couldn't we have been breathalysing? couldn't you have been breathalysing? couldn't they have been breathalysing?