could mechanise
Regular verb: mechanise - mechanised- mechanised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could mechanise
you could mechanise
he could mechanise
we could mechanise
you could mechanise
they could mechanise 	I could be mechanising
you could be mechanising
he could be mechanising
we could be mechanising
you could be mechanising
they could be mechanising	I could have mechanised
you could have mechanised
he could have mechanised
we could have mechanised
you could have mechanised
they could have mechanised	I could have been mechanising
you could have been mechanising
he could have been mechanising
we could have been mechanising
you could have been mechanising
they could have been mechanising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't mechanise
you couldn't mechanise
he couldn't mechanise
we couldn't mechanise
you couldn't mechanise
they couldn't mechanise 	I couldn't be mechanising
you couldn't be mechanising
he couldn't be mechanising
we couldn't be mechanising
you couldn't be mechanising
they couldn't be mechanising	I couldn't have mechanised
you couldn't have mechanised
he couldn't have mechanised
we couldn't have mechanised
you couldn't have mechanised
they couldn't have mechanised	I couldn't have been mechanising
you couldn't have been mechanising
he couldn't have been mechanising
we couldn't have been mechanising
you couldn't have been mechanising
they couldn't have been mechanising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I mechanise?
could you mechanise?
could he mechanise?
could we mechanise?
could you mechanise?
could they mechanise? 	could I be mechanising?
could you be mechanising?
could he be mechanising?
could we be mechanising?
could you be mechanising?
could they be mechanising? 	could I have mechanised?
could you have mechanised?
could he have mechanised?
could we have mechanised?
could you have mechanised?
could they have mechanised? 	could I have been mechanising?
could you have been mechanising?
could he have been mechanising?
could we have been mechanising?
could you have been mechanising?
could they have been mechanising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I mechanise?
couldn't you mechanise?
couldn't he mechanise?
couldn't we mechanise?
couldn't you mechanise?
couldn't they mechanise? 	couldn't I be mechanising?
couldn't you be mechanising?
couldn't he be mechanising?
couldn't we be mechanising?
couldn't you be mechanising?
couldn't they be mechanising? 	couldn't I have mechanised?
couldn't you have mechanised?
couldn't he have mechanised?
couldn't we have mechanised?
couldn't you have mechanised?
couldn't they have mechanised? 	couldn't I have been mechanising?
couldn't you have been mechanising?
couldn't he have been mechanising?
couldn't we have been mechanising?
couldn't you have been mechanising?
couldn't they have been mechanising?