could halogenate
Regular verb: halogenate - halogenated- halogenated

Affirmation 	
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I could halogenate
you could halogenate
he could halogenate
we could halogenate
you could halogenate
they could halogenate 	I could be halogenating
you could be halogenating
he could be halogenating
we could be halogenating
you could be halogenating
they could be halogenating	I could have halogenated
you could have halogenated
he could have halogenated
we could have halogenated
you could have halogenated
they could have halogenated	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 	
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I couldn't halogenate
you couldn't halogenate
he couldn't halogenate
we couldn't halogenate
you couldn't halogenate
they couldn't halogenate 	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	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	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 	
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could I halogenate?
could you halogenate?
could he halogenate?
could we halogenate?
could you halogenate?
could they halogenate? 	could I be halogenating?
could you be halogenating?
could he be halogenating?
could we be halogenating?
could you be halogenating?
could they be halogenating? 	could I have halogenated?
could you have halogenated?
could he have halogenated?
could we have halogenated?
could you have halogenated?
could they have halogenated? 	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 	
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couldn't I halogenate?
couldn't you halogenate?
couldn't he halogenate?
couldn't we halogenate?
couldn't you halogenate?
couldn't they halogenate? 	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? 	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? 	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?