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