English verb conjugation
CAN THUD

Regular verb: thud - thudded - thudded

Affirmation

Simple form	V-ing form
I can thud you can thud he can thud we can thud you can thud they can thud	I can be thudding you can be thudding he can be thudding we can be thudding you can be thudding they can be thudding
Perfect	V-ing perfect
I can have thudded you can have thudded he 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 he 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
I can't thud you can't thud he can't thud we can't thud you can't thud they can't thud	I can't be thudding you can't be thudding he can't be thudding we can't be thudding you can't be thudding they can't be thudding
Perfect	V-ing perfect
I can't have thudded you can't have thudded he can't have thudded we can't have thudded you can't have thudded they can't have thudded	I can't have been thudding you can't have been thudding he can't have been thudding we can't have been thudding you can't have been thudding they can't have been thudding

Interrogative form

Simple form	V-ing form
can I thud? can you thud? can he thud? can we thud? can you thud? can they thud?	can I be thudding? can you be thudding? can he be thudding? can we be thudding? can you be thudding? can they be thudding?
Perfect	V-ing perfect
can I have thudded? can you have thudded? can he 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 he 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
can't I thud? can't you thud? can't he thud? can't we thud? can't you thud? can't they thud?	can't I be thudding? can't you be thudding? can't he be thudding? can't we be thudding? can't you be thudding? can't they be thudding?
Perfect	V-ing perfect
can't I have thudded? can't you have thudded? can't he have thudded? can't we have thudded? can't you have thudded? can't they have thudded?	can't I have been thudding? can't you have been thudding? can't he have been thudding? can't we have been thudding? can't you have been thudding? can't they have been thudding?