English verb conjugation
COULD SOLDER

Regular verb: solder - soldered - soldered

Affirmation

Simple form	V-ing form
I could solder you could solder he could solder we could solder you could solder they could solder	I could be soldering you could be soldering he could be soldering we could be soldering you could be soldering they could be soldering
Perfect	V-ing perfect
I could have soldered you could have soldered he could have soldered we could have soldered you could have soldered they could have soldered	I could have been soldering you could have been soldering he could have been soldering we could have been soldering you could have been soldering they could have been soldering

Negation

Simple form	V-ing form
I could not solder you could not solder he could not solder we could not solder you could not solder they could not solder	I could not be soldering you could not be soldering he could not be soldering we could not be soldering you could not be soldering they could not be soldering
Perfect	V-ing perfect
I could not have soldered you could not have soldered he could not have soldered we could not have soldered you could not have soldered they could not have soldered	I could not have been soldering you could not have been soldering he could not have been soldering we could not have been soldering you could not have been soldering they could not have been soldering

Interrogative form

Simple form	V-ing form
could I solder? could you solder? could he solder? could we solder? could you solder? could they solder?	could I be soldering? could you be soldering? could he be soldering? could we be soldering? could you be soldering? could they be soldering?
Perfect	V-ing perfect
could I have soldered? could you have soldered? could he have soldered? could we have soldered? could you have soldered? could they have soldered?	could I have been soldering? could you have been soldering? could he have been soldering? could we have been soldering? could you have been soldering? could they have been soldering?

Interro-negative form

Simple form	V-ing form
could I not solder? could you not solder? could he not solder? could we not solder? could you not solder? could they not solder?	could I not be soldering? could you not be soldering? could he not be soldering? could we not be soldering? could you not be soldering? could they not be soldering?
Perfect	V-ing perfect
could I not have soldered? could you not have soldered? could he not have soldered? could we not have soldered? could you not have soldered? could they not have soldered?	could I not have been soldering? could you not have been soldering? could he not have been soldering? could we not have been soldering? could you not have been soldering? could they not have been soldering?