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 cannot puzzle you cannot puzzle he cannot puzzle we cannot puzzle you cannot puzzle they cannot puzzle	I cannot be puzzling you cannot be puzzling he cannot be puzzling we cannot be puzzling you cannot be puzzling they cannot be puzzling
Perfect	V-ing perfect
I cannot have puzzled you cannot have puzzled he cannot have puzzled we cannot have puzzled you cannot have puzzled they cannot have puzzled	I cannot have been puzzling you cannot have been puzzling he cannot have been puzzling we cannot have been puzzling you cannot have been puzzling they cannot 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 I not puzzle? can you not puzzle? can he not puzzle? can we not puzzle? can you not puzzle? can they not puzzle?	can I not be puzzling? can you not be puzzling? can he not be puzzling? can we not be puzzling? can you not be puzzling? can they not be puzzling?
Perfect	V-ing perfect
can I not have puzzled? can you not have puzzled? can he not have puzzled? can we not have puzzled? can you not have puzzled? can they not have puzzled?	can I not have been puzzling? can you not have been puzzling? can he not have been puzzling? can we not have been puzzling? can you not have been puzzling? can they not have been puzzling?