English verb conjugation
CAN THANK

Regular verb: thank - thanked - thanked

Affirmation

Simple form	V-ing form
I can thank you can thank he can thank we can thank you can thank they can thank	I can be thanking you can be thanking he can be thanking we can be thanking you can be thanking they can be thanking
Perfect	V-ing perfect
I can have thanked you can have thanked he can have thanked we can have thanked you can have thanked they can have thanked	I can have been thanking you can have been thanking he can have been thanking we can have been thanking you can have been thanking they can have been thanking

Negation

Simple form	V-ing form
I cannot thank you cannot thank he cannot thank we cannot thank you cannot thank they cannot thank	I cannot be thanking you cannot be thanking he cannot be thanking we cannot be thanking you cannot be thanking they cannot be thanking
Perfect	V-ing perfect
I cannot have thanked you cannot have thanked he cannot have thanked we cannot have thanked you cannot have thanked they cannot have thanked	I cannot have been thanking you cannot have been thanking he cannot have been thanking we cannot have been thanking you cannot have been thanking they cannot have been thanking

Interrogative form

Simple form	V-ing form
can I thank? can you thank? can he thank? can we thank? can you thank? can they thank?	can I be thanking? can you be thanking? can he be thanking? can we be thanking? can you be thanking? can they be thanking?
Perfect	V-ing perfect
can I have thanked? can you have thanked? can he have thanked? can we have thanked? can you have thanked? can they have thanked?	can I have been thanking? can you have been thanking? can he have been thanking? can we have been thanking? can you have been thanking? can they have been thanking?

Interro-negative form

Simple form	V-ing form
can I not thank? can you not thank? can he not thank? can we not thank? can you not thank? can they not thank?	can I not be thanking? can you not be thanking? can he not be thanking? can we not be thanking? can you not be thanking? can they not be thanking?
Perfect	V-ing perfect
can I not have thanked? can you not have thanked? can he not have thanked? can we not have thanked? can you not have thanked? can they not have thanked?	can I not have been thanking? can you not have been thanking? can he not have been thanking? can we not have been thanking? can you not have been thanking? can they not have been thanking?