English verb conjugation
COULD UNBLOCK

Regular verb: unblock - unblocked - unblocked

Affirmation

Simple form	V-ing form
I could unblock you could unblock he could unblock we could unblock you could unblock they could unblock	I could be unblocking you could be unblocking he could be unblocking we could be unblocking you could be unblocking they could be unblocking
Perfect	V-ing perfect
I could have unblocked you could have unblocked he could have unblocked we could have unblocked you could have unblocked they could have unblocked	I could have been unblocking you could have been unblocking he could have been unblocking we could have been unblocking you could have been unblocking they could have been unblocking

Negation

Simple form	V-ing form
I couldn't unblock you couldn't unblock he couldn't unblock we couldn't unblock you couldn't unblock they couldn't unblock	I couldn't be unblocking you couldn't be unblocking he couldn't be unblocking we couldn't be unblocking you couldn't be unblocking they couldn't be unblocking
Perfect	V-ing perfect
I couldn't have unblocked you couldn't have unblocked he couldn't have unblocked we couldn't have unblocked you couldn't have unblocked they couldn't have unblocked	I couldn't have been unblocking you couldn't have been unblocking he couldn't have been unblocking we couldn't have been unblocking you couldn't have been unblocking they couldn't have been unblocking

Interrogative form

Simple form	V-ing form
could I unblock? could you unblock? could he unblock? could we unblock? could you unblock? could they unblock?	could I be unblocking? could you be unblocking? could he be unblocking? could we be unblocking? could you be unblocking? could they be unblocking?
Perfect	V-ing perfect
could I have unblocked? could you have unblocked? could he have unblocked? could we have unblocked? could you have unblocked? could they have unblocked?	could I have been unblocking? could you have been unblocking? could he have been unblocking? could we have been unblocking? could you have been unblocking? could they have been unblocking?

Interro-negative form

Simple form	V-ing form
couldn't I unblock? couldn't you unblock? couldn't he unblock? couldn't we unblock? couldn't you unblock? couldn't they unblock?	couldn't I be unblocking? couldn't you be unblocking? couldn't he be unblocking? couldn't we be unblocking? couldn't you be unblocking? couldn't they be unblocking?
Perfect	V-ing perfect
couldn't I have unblocked? couldn't you have unblocked? couldn't he have unblocked? couldn't we have unblocked? couldn't you have unblocked? couldn't they have unblocked?	couldn't I have been unblocking? couldn't you have been unblocking? couldn't he have been unblocking? couldn't we have been unblocking? couldn't you have been unblocking? couldn't they have been unblocking?