English verb conjugation
CAN LAND

Regular verb: land - landed - landed

Affirmation

Simple form	V-ing form
I can land you can land he can land we can land you can land they can land	I can be landing you can be landing he can be landing we can be landing you can be landing they can be landing
Perfect	V-ing perfect
I can have landed you can have landed he can have landed we can have landed you can have landed they can have landed	I can have been landing you can have been landing he can have been landing we can have been landing you can have been landing they can have been landing

Negation

Simple form	V-ing form
I can't land you can't land he can't land we can't land you can't land they can't land	I can't be landing you can't be landing he can't be landing we can't be landing you can't be landing they can't be landing
Perfect	V-ing perfect
I can't have landed you can't have landed he can't have landed we can't have landed you can't have landed they can't have landed	I can't have been landing you can't have been landing he can't have been landing we can't have been landing you can't have been landing they can't have been landing

Interrogative form

Simple form	V-ing form
can I land? can you land? can he land? can we land? can you land? can they land?	can I be landing? can you be landing? can he be landing? can we be landing? can you be landing? can they be landing?
Perfect	V-ing perfect
can I have landed? can you have landed? can he have landed? can we have landed? can you have landed? can they have landed?	can I have been landing? can you have been landing? can he have been landing? can we have been landing? can you have been landing? can they have been landing?

Interro-negative form

Simple form	V-ing form
can't I land? can't you land? can't he land? can't we land? can't you land? can't they land?	can't I be landing? can't you be landing? can't he be landing? can't we be landing? can't you be landing? can't they be landing?
Perfect	V-ing perfect
can't I have landed? can't you have landed? can't he have landed? can't we have landed? can't you have landed? can't they have landed?	can't I have been landing? can't you have been landing? can't he have been landing? can't we have been landing? can't you have been landing? can't they have been landing?