English verb conjugation
COULD CRASH-LAND

Regular verb: crash-land - crash-landed - crash-landed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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