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