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