I could halogenate you could halogenate he could halogenate we could halogenate you could halogenate they could halogenate
V-ing form
I could be halogenating you could be halogenating he could be halogenating we could be halogenating you could be halogenating they could be halogenating
Perfect
I could have halogenated you could have halogenated he could have halogenated we could have halogenated you could have halogenated they could have halogenated
V-ing perfect
I could have been halogenating you could have been halogenating he could have been halogenating we could have been halogenating you could have been halogenating they could have been halogenating
Negation
Simple form
I couldn't halogenate you couldn't halogenate he couldn't halogenate we couldn't halogenate you couldn't halogenate they couldn't halogenate
V-ing form
I couldn't be halogenating you couldn't be halogenating he couldn't be halogenating we couldn't be halogenating you couldn't be halogenating they couldn't be halogenating
Perfect
I couldn't have halogenated you couldn't have halogenated he couldn't have halogenated we couldn't have halogenated you couldn't have halogenated they couldn't have halogenated
V-ing perfect
I couldn't have been halogenating you couldn't have been halogenating he couldn't have been halogenating we couldn't have been halogenating you couldn't have been halogenating they couldn't have been halogenating
Interrogative form
Simple form
could I halogenate? could you halogenate? could he halogenate? could we halogenate? could you halogenate? could they halogenate?
V-ing form
could I be halogenating? could you be halogenating? could he be halogenating? could we be halogenating? could you be halogenating? could they be halogenating?
Perfect
could I have halogenated? could you have halogenated? could he have halogenated? could we have halogenated? could you have halogenated? could they have halogenated?
V-ing perfect
could I have been halogenating? could you have been halogenating? could he have been halogenating? could we have been halogenating? could you have been halogenating? could they have been halogenating?
Interro-negative form
Simple form
couldn't I halogenate? couldn't you halogenate? couldn't he halogenate? couldn't we halogenate? couldn't you halogenate? couldn't they halogenate?
V-ing form
couldn't I be halogenating? couldn't you be halogenating? couldn't he be halogenating? couldn't we be halogenating? couldn't you be halogenating? couldn't they be halogenating?
Perfect
couldn't I have halogenated? couldn't you have halogenated? couldn't he have halogenated? couldn't we have halogenated? couldn't you have halogenated? couldn't they have halogenated?
V-ing perfect
couldn't I have been halogenating? couldn't you have been halogenating? couldn't he have been halogenating? couldn't we have been halogenating? couldn't you have been halogenating? couldn't they have been halogenating?