could propel
Regular verb: propel - propelled- propelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could propel
you could propel
he could propel
we could propel
you could propel
they could propel 	I could be propelling
you could be propelling
he could be propelling
we could be propelling
you could be propelling
they could be propelling	I could have propelled
you could have propelled
he could have propelled
we could have propelled
you could have propelled
they could have propelled	I could have been propelling
you could have been propelling
he could have been propelling
we could have been propelling
you could have been propelling
they could have been propelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't propel
you couldn't propel
he couldn't propel
we couldn't propel
you couldn't propel
they couldn't propel 	I couldn't be propelling
you couldn't be propelling
he couldn't be propelling
we couldn't be propelling
you couldn't be propelling
they couldn't be propelling	I couldn't have propelled
you couldn't have propelled
he couldn't have propelled
we couldn't have propelled
you couldn't have propelled
they couldn't have propelled	I couldn't have been propelling
you couldn't have been propelling
he couldn't have been propelling
we couldn't have been propelling
you couldn't have been propelling
they couldn't have been propelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I propel?
could you propel?
could he propel?
could we propel?
could you propel?
could they propel? 	could I be propelling?
could you be propelling?
could he be propelling?
could we be propelling?
could you be propelling?
could they be propelling? 	could I have propelled?
could you have propelled?
could he have propelled?
could we have propelled?
could you have propelled?
could they have propelled? 	could I have been propelling?
could you have been propelling?
could he have been propelling?
could we have been propelling?
could you have been propelling?
could they have been propelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I propel?
couldn't you propel?
couldn't he propel?
couldn't we propel?
couldn't you propel?
couldn't they propel? 	couldn't I be propelling?
couldn't you be propelling?
couldn't he be propelling?
couldn't we be propelling?
couldn't you be propelling?
couldn't they be propelling? 	couldn't I have propelled?
couldn't you have propelled?
couldn't he have propelled?
couldn't we have propelled?
couldn't you have propelled?
couldn't they have propelled? 	couldn't I have been propelling?
couldn't you have been propelling?
couldn't he have been propelling?
couldn't we have been propelling?
couldn't you have been propelling?
couldn't they have been propelling?