could wipe
Regular verb: wipe - wiped- wiped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could wipe
you could wipe
she could wipe
we could wipe
you could wipe
they could wipe 	I could be wiping
you could be wiping
she could be wiping
we could be wiping
you could be wiping
they could be wiping	I could have wiped
you could have wiped
she could have wiped
we could have wiped
you could have wiped
they could have wiped	I could have been wiping
you could have been wiping
she could have been wiping
we could have been wiping
you could have been wiping
they could have been wiping	

Negation 	
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I couldn't wipe
you couldn't wipe
she couldn't wipe
we couldn't wipe
you couldn't wipe
they couldn't wipe 	I couldn't be wiping
you couldn't be wiping
she couldn't be wiping
we couldn't be wiping
you couldn't be wiping
they couldn't be wiping	I couldn't have wiped
you couldn't have wiped
she couldn't have wiped
we couldn't have wiped
you couldn't have wiped
they couldn't have wiped	I couldn't have been wiping
you couldn't have been wiping
she couldn't have been wiping
we couldn't have been wiping
you couldn't have been wiping
they couldn't have been wiping	

Interrogative form 	
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could I wipe?
could you wipe?
could she wipe?
could we wipe?
could you wipe?
could they wipe? 	could I be wiping?
could you be wiping?
could she be wiping?
could we be wiping?
could you be wiping?
could they be wiping? 	could I have wiped?
could you have wiped?
could she have wiped?
could we have wiped?
could you have wiped?
could they have wiped? 	could I have been wiping?
could you have been wiping?
could she have been wiping?
could we have been wiping?
could you have been wiping?
could they have been wiping? 	

Interro-negative form 	
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couldn't I wipe?
couldn't you wipe?
couldn't she wipe?
couldn't we wipe?
couldn't you wipe?
couldn't they wipe? 	couldn't I be wiping?
couldn't you be wiping?
couldn't she be wiping?
couldn't we be wiping?
couldn't you be wiping?
couldn't they be wiping? 	couldn't I have wiped?
couldn't you have wiped?
couldn't she have wiped?
couldn't we have wiped?
couldn't you have wiped?
couldn't they have wiped? 	couldn't I have been wiping?
couldn't you have been wiping?
couldn't she have been wiping?
couldn't we have been wiping?
couldn't you have been wiping?
couldn't they have been wiping?