could weatherise
Regular verb: weatherise - weatherised- weatherised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could weatherise
you could weatherise
he could weatherise
we could weatherise
you could weatherise
they could weatherise 	I could be weatherising
you could be weatherising
he could be weatherising
we could be weatherising
you could be weatherising
they could be weatherising	I could have weatherised
you could have weatherised
he could have weatherised
we could have weatherised
you could have weatherised
they could have weatherised	I could have been weatherising
you could have been weatherising
he could have been weatherising
we could have been weatherising
you could have been weatherising
they could have been weatherising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not weatherise
you could not weatherise
he could not weatherise
we could not weatherise
you could not weatherise
they could not weatherise 	I could not be weatherising
you could not be weatherising
he could not be weatherising
we could not be weatherising
you could not be weatherising
they could not be weatherising	I could not have weatherised
you could not have weatherised
he could not have weatherised
we could not have weatherised
you could not have weatherised
they could not have weatherised	I could not have been weatherising
you could not have been weatherising
he could not have been weatherising
we could not have been weatherising
you could not have been weatherising
they could not have been weatherising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I weatherise?
could you weatherise?
could he weatherise?
could we weatherise?
could you weatherise?
could they weatherise? 	could I be weatherising?
could you be weatherising?
could he be weatherising?
could we be weatherising?
could you be weatherising?
could they be weatherising? 	could I have weatherised?
could you have weatherised?
could he have weatherised?
could we have weatherised?
could you have weatherised?
could they have weatherised? 	could I have been weatherising?
could you have been weatherising?
could he have been weatherising?
could we have been weatherising?
could you have been weatherising?
could they have been weatherising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not weatherise?
could you not weatherise?
could he not weatherise?
could we not weatherise?
could you not weatherise?
could they not weatherise? 	could I not be weatherising?
could you not be weatherising?
could he not be weatherising?
could we not be weatherising?
could you not be weatherising?
could they not be weatherising? 	could I not have weatherised?
could you not have weatherised?
could he not have weatherised?
could we not have weatherised?
could you not have weatherised?
could they not have weatherised? 	could I not have been weatherising?
could you not have been weatherising?
could he not have been weatherising?
could we not have been weatherising?
could you not have been weatherising?
could they not have been weatherising?