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