I could tender you could tender she could tender we could tender you could tender they could tender
V-ing form
I could be tendering you could be tendering she could be tendering we could be tendering you could be tendering they could be tendering
Perfect
I could have tendered you could have tendered she could have tendered we could have tendered you could have tendered they could have tendered
V-ing perfect
I could have been tendering you could have been tendering she could have been tendering we could have been tendering you could have been tendering they could have been tendering
Negation
Simple form
I couldn't tender you couldn't tender she couldn't tender we couldn't tender you couldn't tender they couldn't tender
V-ing form
I couldn't be tendering you couldn't be tendering she couldn't be tendering we couldn't be tendering you couldn't be tendering they couldn't be tendering
Perfect
I couldn't have tendered you couldn't have tendered she couldn't have tendered we couldn't have tendered you couldn't have tendered they couldn't have tendered
V-ing perfect
I couldn't have been tendering you couldn't have been tendering she couldn't have been tendering we couldn't have been tendering you couldn't have been tendering they couldn't have been tendering
Interrogative form
Simple form
could I tender? could you tender? could she tender? could we tender? could you tender? could they tender?
V-ing form
could I be tendering? could you be tendering? could she be tendering? could we be tendering? could you be tendering? could they be tendering?
Perfect
could I have tendered? could you have tendered? could she have tendered? could we have tendered? could you have tendered? could they have tendered?
V-ing perfect
could I have been tendering? could you have been tendering? could she have been tendering? could we have been tendering? could you have been tendering? could they have been tendering?
Interro-negative form
Simple form
couldn't I tender? couldn't you tender? couldn't she tender? couldn't we tender? couldn't you tender? couldn't they tender?
V-ing form
couldn't I be tendering? couldn't you be tendering? couldn't she be tendering? couldn't we be tendering? couldn't you be tendering? couldn't they be tendering?
Perfect
couldn't I have tendered? couldn't you have tendered? couldn't she have tendered? couldn't we have tendered? couldn't you have tendered? couldn't they have tendered?
V-ing perfect
couldn't I have been tendering? couldn't you have been tendering? couldn't she have been tendering? couldn't we have been tendering? couldn't you have been tendering? couldn't they have been tendering?