can smoulder
Regular verb: smoulder - smouldered- smouldered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can smoulder
you can smoulder
she can smoulder
we can smoulder
you can smoulder
they can smoulder 	I can be smouldering
you can be smouldering
she can be smouldering
we can be smouldering
you can be smouldering
they can be smouldering	I can have smouldered
you can have smouldered
she can have smouldered
we can have smouldered
you can have smouldered
they can have smouldered	I can have been smouldering
you can have been smouldering
she can have been smouldering
we can have been smouldering
you can have been smouldering
they can have been smouldering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot smoulder
you cannot smoulder
she cannot smoulder
we cannot smoulder
you cannot smoulder
they cannot smoulder 	I cannot be smouldering
you cannot be smouldering
she cannot be smouldering
we cannot be smouldering
you cannot be smouldering
they cannot be smouldering	I cannot have smouldered
you cannot have smouldered
she cannot have smouldered
we cannot have smouldered
you cannot have smouldered
they cannot have smouldered	I cannot have been smouldering
you cannot have been smouldering
she cannot have been smouldering
we cannot have been smouldering
you cannot have been smouldering
they cannot have been smouldering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I smoulder?
can you smoulder?
can she smoulder?
can we smoulder?
can you smoulder?
can they smoulder? 	can I be smouldering?
can you be smouldering?
can she be smouldering?
can we be smouldering?
can you be smouldering?
can they be smouldering? 	can I have smouldered?
can you have smouldered?
can she have smouldered?
can we have smouldered?
can you have smouldered?
can they have smouldered? 	can I have been smouldering?
can you have been smouldering?
can she have been smouldering?
can we have been smouldering?
can you have been smouldering?
can they have been smouldering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not smoulder?
can you not smoulder?
can she not smoulder?
can we not smoulder?
can you not smoulder?
can they not smoulder? 	can I not be smouldering?
can you not be smouldering?
can she not be smouldering?
can we not be smouldering?
can you not be smouldering?
can they not be smouldering? 	can I not have smouldered?
can you not have smouldered?
can she not have smouldered?
can we not have smouldered?
can you not have smouldered?
can they not have smouldered? 	can I not have been smouldering?
can you not have been smouldering?
can she not have been smouldering?
can we not have been smouldering?
can you not have been smouldering?
can they not have been smouldering?