English verb conjugation
CAN LAND

Regular verb: land - landed - landed

Affirmation

Simple form	V-ing form
I can land you can land she can land we can land you can land they can land	I can be landing you can be landing she 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 she 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 she 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 cannot land you cannot land she cannot land we cannot land you cannot land they cannot land	I cannot be landing you cannot be landing she cannot be landing we cannot be landing you cannot be landing they cannot be landing
Perfect	V-ing perfect
I cannot have landed you cannot have landed she cannot have landed we cannot have landed you cannot have landed they cannot have landed	I cannot have been landing you cannot have been landing she cannot have been landing we cannot have been landing you cannot have been landing they cannot have been landing

Interrogative form

Simple form	V-ing form
can I land? can you land? can she land? can we land? can you land? can they land?	can I be landing? can you be landing? can she 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 she 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 she 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 I not land? can you not land? can she not land? can we not land? can you not land? can they not land?	can I not be landing? can you not be landing? can she not be landing? can we not be landing? can you not be landing? can they not be landing?
Perfect	V-ing perfect
can I not have landed? can you not have landed? can she not have landed? can we not have landed? can you not have landed? can they not have landed?	can I not have been landing? can you not have been landing? can she not have been landing? can we not have been landing? can you not have been landing? can they not have been landing?