could land
Regular verb: land - landed- landed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could land
you could land
she could land
we could land
you could land
they could land 	I could be landing
you could be landing
she could be landing
we could be landing
you could be landing
they could be landing	I could have landed
you could have landed
she could have landed
we could have landed
you could have landed
they could have landed	I could have been landing
you could have been landing
she could have been landing
we could have been landing
you could have been landing
they could have been landing	

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

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I land?
could you land?
could she land?
could we land?
could you land?
could they land? 	could I be landing?
could you be landing?
could she be landing?
could we be landing?
could you be landing?
could they be landing? 	could I have landed?
could you have landed?
could she have landed?
could we have landed?
could you have landed?
could they have landed? 	could I have been landing?
could you have been landing?
could she have been landing?
could we have been landing?
could you have been landing?
could they have been landing? 	

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