can thud
Regular verb: thud - thudded- thudded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can thud
you can thud
she can thud
we can thud
you can thud
they can thud 	I can be thudding
you can be thudding
she can be thudding
we can be thudding
you can be thudding
they can be thudding	I can have thudded
you can have thudded
she can have thudded
we can have thudded
you can have thudded
they can have thudded	I can have been thudding
you can have been thudding
she can have been thudding
we can have been thudding
you can have been thudding
they can have been thudding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot thud
you cannot thud
she cannot thud
we cannot thud
you cannot thud
they cannot thud 	I cannot be thudding
you cannot be thudding
she cannot be thudding
we cannot be thudding
you cannot be thudding
they cannot be thudding	I cannot have thudded
you cannot have thudded
she cannot have thudded
we cannot have thudded
you cannot have thudded
they cannot have thudded	I cannot have been thudding
you cannot have been thudding
she cannot have been thudding
we cannot have been thudding
you cannot have been thudding
they cannot have been thudding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I thud?
can you thud?
can she thud?
can we thud?
can you thud?
can they thud? 	can I be thudding?
can you be thudding?
can she be thudding?
can we be thudding?
can you be thudding?
can they be thudding? 	can I have thudded?
can you have thudded?
can she have thudded?
can we have thudded?
can you have thudded?
can they have thudded? 	can I have been thudding?
can you have been thudding?
can she have been thudding?
can we have been thudding?
can you have been thudding?
can they have been thudding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not thud?
can you not thud?
can she not thud?
can we not thud?
can you not thud?
can they not thud? 	can I not be thudding?
can you not be thudding?
can she not be thudding?
can we not be thudding?
can you not be thudding?
can they not be thudding? 	can I not have thudded?
can you not have thudded?
can she not have thudded?
can we not have thudded?
can you not have thudded?
can they not have thudded? 	can I not have been thudding?
can you not have been thudding?
can she not have been thudding?
can we not have been thudding?
can you not have been thudding?
can they not have been thudding?