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