English verb conjugation
CAN CLIMB

Regular verb: climb - climbed - climbed

Affirmation

Simple form	V-ing form
I can climb you can climb he can climb we can climb you can climb they can climb	I can be climbing you can be climbing he can be climbing we can be climbing you can be climbing they can be climbing
Perfect	V-ing perfect
I can have climbed you can have climbed he can have climbed we can have climbed you can have climbed they can have climbed	I can have been climbing you can have been climbing he can have been climbing we can have been climbing you can have been climbing they can have been climbing

Negation

Simple form	V-ing form
I can't climb you can't climb he can't climb we can't climb you can't climb they can't climb	I can't be climbing you can't be climbing he can't be climbing we can't be climbing you can't be climbing they can't be climbing
Perfect	V-ing perfect
I can't have climbed you can't have climbed he can't have climbed we can't have climbed you can't have climbed they can't have climbed	I can't have been climbing you can't have been climbing he can't have been climbing we can't have been climbing you can't have been climbing they can't have been climbing

Interrogative form

Simple form	V-ing form
can I climb? can you climb? can he climb? can we climb? can you climb? can they climb?	can I be climbing? can you be climbing? can he be climbing? can we be climbing? can you be climbing? can they be climbing?
Perfect	V-ing perfect
can I have climbed? can you have climbed? can he have climbed? can we have climbed? can you have climbed? can they have climbed?	can I have been climbing? can you have been climbing? can he have been climbing? can we have been climbing? can you have been climbing? can they have been climbing?

Interro-negative form

Simple form	V-ing form
can't I climb? can't you climb? can't he climb? can't we climb? can't you climb? can't they climb?	can't I be climbing? can't you be climbing? can't he be climbing? can't we be climbing? can't you be climbing? can't they be climbing?
Perfect	V-ing perfect
can't I have climbed? can't you have climbed? can't he have climbed? can't we have climbed? can't you have climbed? can't they have climbed?	can't I have been climbing? can't you have been climbing? can't he have been climbing? can't we have been climbing? can't you have been climbing? can't they have been climbing?