English verb conjugation
COULD SHIELD

Regular verb: shield - shielded - shielded

Affirmation

Simple form	V-ing form
I could shield you could shield she could shield we could shield you could shield they could shield	I could be shielding you could be shielding she could be shielding we could be shielding you could be shielding they could be shielding
Perfect	V-ing perfect
I could have shielded you could have shielded she could have shielded we could have shielded you could have shielded they could have shielded	I could have been shielding you could have been shielding she could have been shielding we could have been shielding you could have been shielding they could have been shielding

Negation

Simple form	V-ing form
I couldn't shield you couldn't shield she couldn't shield we couldn't shield you couldn't shield they couldn't shield	I couldn't be shielding you couldn't be shielding she couldn't be shielding we couldn't be shielding you couldn't be shielding they couldn't be shielding
Perfect	V-ing perfect
I couldn't have shielded you couldn't have shielded she couldn't have shielded we couldn't have shielded you couldn't have shielded they couldn't have shielded	I couldn't have been shielding you couldn't have been shielding she couldn't have been shielding we couldn't have been shielding you couldn't have been shielding they couldn't have been shielding

Interrogative form

Simple form	V-ing form
could I shield? could you shield? could she shield? could we shield? could you shield? could they shield?	could I be shielding? could you be shielding? could she be shielding? could we be shielding? could you be shielding? could they be shielding?
Perfect	V-ing perfect
could I have shielded? could you have shielded? could she have shielded? could we have shielded? could you have shielded? could they have shielded?	could I have been shielding? could you have been shielding? could she have been shielding? could we have been shielding? could you have been shielding? could they have been shielding?

Interro-negative form

Simple form	V-ing form
couldn't I shield? couldn't you shield? couldn't she shield? couldn't we shield? couldn't you shield? couldn't they shield?	couldn't I be shielding? couldn't you be shielding? couldn't she be shielding? couldn't we be shielding? couldn't you be shielding? couldn't they be shielding?
Perfect	V-ing perfect
couldn't I have shielded? couldn't you have shielded? couldn't she have shielded? couldn't we have shielded? couldn't you have shielded? couldn't they have shielded?	couldn't I have been shielding? couldn't you have been shielding? couldn't she have been shielding? couldn't we have been shielding? couldn't you have been shielding? couldn't they have been shielding?