could methylate
Regular verb: methylate - methylated- methylated

Affirmation 	
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I could methylate
you could methylate
she could methylate
we could methylate
you could methylate
they could methylate 	I could be methylating
you could be methylating
she could be methylating
we could be methylating
you could be methylating
they could be methylating	I could have methylated
you could have methylated
she could have methylated
we could have methylated
you could have methylated
they could have methylated	I could have been methylating
you could have been methylating
she could have been methylating
we could have been methylating
you could have been methylating
they could have been methylating	

Negation 	
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I couldn't methylate
you couldn't methylate
she couldn't methylate
we couldn't methylate
you couldn't methylate
they couldn't methylate 	I couldn't be methylating
you couldn't be methylating
she couldn't be methylating
we couldn't be methylating
you couldn't be methylating
they couldn't be methylating	I couldn't have methylated
you couldn't have methylated
she couldn't have methylated
we couldn't have methylated
you couldn't have methylated
they couldn't have methylated	I couldn't have been methylating
you couldn't have been methylating
she couldn't have been methylating
we couldn't have been methylating
you couldn't have been methylating
they couldn't have been methylating	

Interrogative form 	
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could I methylate?
could you methylate?
could she methylate?
could we methylate?
could you methylate?
could they methylate? 	could I be methylating?
could you be methylating?
could she be methylating?
could we be methylating?
could you be methylating?
could they be methylating? 	could I have methylated?
could you have methylated?
could she have methylated?
could we have methylated?
could you have methylated?
could they have methylated? 	could I have been methylating?
could you have been methylating?
could she have been methylating?
could we have been methylating?
could you have been methylating?
could they have been methylating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I methylate?
couldn't you methylate?
couldn't she methylate?
couldn't we methylate?
couldn't you methylate?
couldn't they methylate? 	couldn't I be methylating?
couldn't you be methylating?
couldn't she be methylating?
couldn't we be methylating?
couldn't you be methylating?
couldn't they be methylating? 	couldn't I have methylated?
couldn't you have methylated?
couldn't she have methylated?
couldn't we have methylated?
couldn't you have methylated?
couldn't they have methylated? 	couldn't I have been methylating?
couldn't you have been methylating?
couldn't she have been methylating?
couldn't we have been methylating?
couldn't you have been methylating?
couldn't they have been methylating?