may cost
Irregular verb: cost - cost- cost

Affirmation 	
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I may cost
you may cost
she may cost
we may cost
you may cost
they may cost 	I may be costing
you may be costing
she may be costing
we may be costing
you may be costing
they may be costing	I may have cost
you may have cost
she may have cost
we may have cost
you may have cost
they may have cost	I may have been costing
you may have been costing
she may have been costing
we may have been costing
you may have been costing
they may have been costing	

Negation 	
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I mayn't cost
you mayn't cost
she mayn't cost
we mayn't cost
you mayn't cost
they mayn't cost 	I mayn't be costing
you mayn't be costing
she mayn't be costing
we mayn't be costing
you mayn't be costing
they mayn't be costing	I mayn't have cost
you mayn't have cost
she mayn't have cost
we mayn't have cost
you mayn't have cost
they mayn't have cost	I mayn't have been costing
you mayn't have been costing
she mayn't have been costing
we mayn't have been costing
you mayn't have been costing
they mayn't have been costing	

Interrogative form 	
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may I cost?
may you cost?
may she cost?
may we cost?
may you cost?
may they cost? 	may I be costing?
may you be costing?
may she be costing?
may we be costing?
may you be costing?
may they be costing? 	may I have cost?
may you have cost?
may she have cost?
may we have cost?
may you have cost?
may they have cost? 	may I have been costing?
may you have been costing?
may she have been costing?
may we have been costing?
may you have been costing?
may they have been costing? 	

Interro-negative form 	
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mayn't I cost?
mayn't you cost?
mayn't she cost?
mayn't we cost?
mayn't you cost?
mayn't they cost? 	mayn't I be costing?
mayn't you be costing?
mayn't she be costing?
mayn't we be costing?
mayn't you be costing?
mayn't they be costing? 	mayn't I have cost?
mayn't you have cost?
mayn't she have cost?
mayn't we have cost?
mayn't you have cost?
mayn't they have cost? 	mayn't I have been costing?
mayn't you have been costing?
mayn't she have been costing?
mayn't we have been costing?
mayn't you have been costing?
mayn't they have been costing?