English verb conjugation
CAN PUZZLE

Regular verb: puzzle - puzzled - puzzled

Affirmation

Simple form	V-ing form
I can puzzle you can puzzle he can puzzle we can puzzle you can puzzle they can puzzle	I can be puzzling you can be puzzling he can be puzzling we can be puzzling you can be puzzling they can be puzzling
Perfect	V-ing perfect
I can have puzzled you can have puzzled he can have puzzled we can have puzzled you can have puzzled they can have puzzled	I can have been puzzling you can have been puzzling he can have been puzzling we can have been puzzling you can have been puzzling they can have been puzzling

Negation

Simple form	V-ing form
I can't puzzle you can't puzzle he can't puzzle we can't puzzle you can't puzzle they can't puzzle	I can't be puzzling you can't be puzzling he can't be puzzling we can't be puzzling you can't be puzzling they can't be puzzling
Perfect	V-ing perfect
I can't have puzzled you can't have puzzled he can't have puzzled we can't have puzzled you can't have puzzled they can't have puzzled	I can't have been puzzling you can't have been puzzling he can't have been puzzling we can't have been puzzling you can't have been puzzling they can't have been puzzling

Interrogative form

Simple form	V-ing form
can I puzzle? can you puzzle? can he puzzle? can we puzzle? can you puzzle? can they puzzle?	can I be puzzling? can you be puzzling? can he be puzzling? can we be puzzling? can you be puzzling? can they be puzzling?
Perfect	V-ing perfect
can I have puzzled? can you have puzzled? can he have puzzled? can we have puzzled? can you have puzzled? can they have puzzled?	can I have been puzzling? can you have been puzzling? can he have been puzzling? can we have been puzzling? can you have been puzzling? can they have been puzzling?

Interro-negative form

Simple form	V-ing form
can't I puzzle? can't you puzzle? can't he puzzle? can't we puzzle? can't you puzzle? can't they puzzle?	can't I be puzzling? can't you be puzzling? can't he be puzzling? can't we be puzzling? can't you be puzzling? can't they be puzzling?
Perfect	V-ing perfect
can't I have puzzled? can't you have puzzled? can't he have puzzled? can't we have puzzled? can't you have puzzled? can't they have puzzled?	can't I have been puzzling? can't you have been puzzling? can't he have been puzzling? can't we have been puzzling? can't you have been puzzling? can't they have been puzzling?