English verb conjugation
CAN GROAN

Regular verb: groan - groaned - groaned

Affirmation

Simple form	V-ing form
I can groan you can groan he can groan we can groan you can groan they can groan	I can be groaning you can be groaning he can be groaning we can be groaning you can be groaning they can be groaning
Perfect	V-ing perfect
I can have groaned you can have groaned he can have groaned we can have groaned you can have groaned they can have groaned	I can have been groaning you can have been groaning he can have been groaning we can have been groaning you can have been groaning they can have been groaning

Negation

Simple form	V-ing form
I cannot groan you cannot groan he cannot groan we cannot groan you cannot groan they cannot groan	I cannot be groaning you cannot be groaning he cannot be groaning we cannot be groaning you cannot be groaning they cannot be groaning
Perfect	V-ing perfect
I cannot have groaned you cannot have groaned he cannot have groaned we cannot have groaned you cannot have groaned they cannot have groaned	I cannot have been groaning you cannot have been groaning he cannot have been groaning we cannot have been groaning you cannot have been groaning they cannot have been groaning

Interrogative form

Simple form	V-ing form
can I groan? can you groan? can he groan? can we groan? can you groan? can they groan?	can I be groaning? can you be groaning? can he be groaning? can we be groaning? can you be groaning? can they be groaning?
Perfect	V-ing perfect
can I have groaned? can you have groaned? can he have groaned? can we have groaned? can you have groaned? can they have groaned?	can I have been groaning? can you have been groaning? can he have been groaning? can we have been groaning? can you have been groaning? can they have been groaning?

Interro-negative form

Simple form	V-ing form
can I not groan? can you not groan? can he not groan? can we not groan? can you not groan? can they not groan?	can I not be groaning? can you not be groaning? can he not be groaning? can we not be groaning? can you not be groaning? can they not be groaning?
Perfect	V-ing perfect
can I not have groaned? can you not have groaned? can he not have groaned? can we not have groaned? can you not have groaned? can they not have groaned?	can I not have been groaning? can you not have been groaning? can he not have been groaning? can we not have been groaning? can you not have been groaning? can they not have been groaning?