English verb conjugation
CAN RIDDLE

Regular verb: riddle - riddled - riddled

Affirmation

Simple form	V-ing form
I can riddle you can riddle she can riddle we can riddle you can riddle they can riddle	I can be riddling you can be riddling she can be riddling we can be riddling you can be riddling they can be riddling
Perfect	V-ing perfect
I can have riddled you can have riddled she can have riddled we can have riddled you can have riddled they can have riddled	I can have been riddling you can have been riddling she can have been riddling we can have been riddling you can have been riddling they can have been riddling

Negation

Simple form	V-ing form
I can't riddle you can't riddle she can't riddle we can't riddle you can't riddle they can't riddle	I can't be riddling you can't be riddling she can't be riddling we can't be riddling you can't be riddling they can't be riddling
Perfect	V-ing perfect
I can't have riddled you can't have riddled she can't have riddled we can't have riddled you can't have riddled they can't have riddled	I can't have been riddling you can't have been riddling she can't have been riddling we can't have been riddling you can't have been riddling they can't have been riddling

Interrogative form

Simple form	V-ing form
can I riddle? can you riddle? can she riddle? can we riddle? can you riddle? can they riddle?	can I be riddling? can you be riddling? can she be riddling? can we be riddling? can you be riddling? can they be riddling?
Perfect	V-ing perfect
can I have riddled? can you have riddled? can she have riddled? can we have riddled? can you have riddled? can they have riddled?	can I have been riddling? can you have been riddling? can she have been riddling? can we have been riddling? can you have been riddling? can they have been riddling?

Interro-negative form

Simple form	V-ing form
can't I riddle? can't you riddle? can't she riddle? can't we riddle? can't you riddle? can't they riddle?	can't I be riddling? can't you be riddling? can't she be riddling? can't we be riddling? can't you be riddling? can't they be riddling?
Perfect	V-ing perfect
can't I have riddled? can't you have riddled? can't she have riddled? can't we have riddled? can't you have riddled? can't they have riddled?	can't I have been riddling? can't you have been riddling? can't she have been riddling? can't we have been riddling? can't you have been riddling? can't they have been riddling?