I could lassoo you could lassoo he could lassoo we could lassoo you could lassoo they could lassoo
V-ing form
I could be lassooing you could be lassooing he could be lassooing we could be lassooing you could be lassooing they could be lassooing
Perfect
I could have lassooed you could have lassooed he could have lassooed we could have lassooed you could have lassooed they could have lassooed
V-ing perfect
I could have been lassooing you could have been lassooing he could have been lassooing we could have been lassooing you could have been lassooing they could have been lassooing
Negation
Simple form
I could not lassoo you could not lassoo he could not lassoo we could not lassoo you could not lassoo they could not lassoo
V-ing form
I could not be lassooing you could not be lassooing he could not be lassooing we could not be lassooing you could not be lassooing they could not be lassooing
Perfect
I could not have lassooed you could not have lassooed he could not have lassooed we could not have lassooed you could not have lassooed they could not have lassooed
V-ing perfect
I could not have been lassooing you could not have been lassooing he could not have been lassooing we could not have been lassooing you could not have been lassooing they could not have been lassooing
Interrogative form
Simple form
could I lassoo? could you lassoo? could he lassoo? could we lassoo? could you lassoo? could they lassoo?
V-ing form
could I be lassooing? could you be lassooing? could he be lassooing? could we be lassooing? could you be lassooing? could they be lassooing?
Perfect
could I have lassooed? could you have lassooed? could he have lassooed? could we have lassooed? could you have lassooed? could they have lassooed?
V-ing perfect
could I have been lassooing? could you have been lassooing? could he have been lassooing? could we have been lassooing? could you have been lassooing? could they have been lassooing?
Interro-negative form
Simple form
could I not lassoo? could you not lassoo? could he not lassoo? could we not lassoo? could you not lassoo? could they not lassoo?
V-ing form
could I not be lassooing? could you not be lassooing? could he not be lassooing? could we not be lassooing? could you not be lassooing? could they not be lassooing?
Perfect
could I not have lassooed? could you not have lassooed? could he not have lassooed? could we not have lassooed? could you not have lassooed? could they not have lassooed?
V-ing perfect
could I not have been lassooing? could you not have been lassooing? could he not have been lassooing? could we not have been lassooing? could you not have been lassooing? could they not have been lassooing?