I could fidget you could fidget he could fidget we could fidget you could fidget they could fidget
V-ing form
I could be fidgeting you could be fidgeting he could be fidgeting we could be fidgeting you could be fidgeting they could be fidgeting
Perfect
I could have fidgeted you could have fidgeted he could have fidgeted we could have fidgeted you could have fidgeted they could have fidgeted
V-ing perfect
I could have been fidgeting you could have been fidgeting he could have been fidgeting we could have been fidgeting you could have been fidgeting they could have been fidgeting
Negation
Simple form
I couldn't fidget you couldn't fidget he couldn't fidget we couldn't fidget you couldn't fidget they couldn't fidget
V-ing form
I couldn't be fidgeting you couldn't be fidgeting he couldn't be fidgeting we couldn't be fidgeting you couldn't be fidgeting they couldn't be fidgeting
Perfect
I couldn't have fidgeted you couldn't have fidgeted he couldn't have fidgeted we couldn't have fidgeted you couldn't have fidgeted they couldn't have fidgeted
V-ing perfect
I couldn't have been fidgeting you couldn't have been fidgeting he couldn't have been fidgeting we couldn't have been fidgeting you couldn't have been fidgeting they couldn't have been fidgeting
Interrogative form
Simple form
could I fidget? could you fidget? could he fidget? could we fidget? could you fidget? could they fidget?
V-ing form
could I be fidgeting? could you be fidgeting? could he be fidgeting? could we be fidgeting? could you be fidgeting? could they be fidgeting?
Perfect
could I have fidgeted? could you have fidgeted? could he have fidgeted? could we have fidgeted? could you have fidgeted? could they have fidgeted?
V-ing perfect
could I have been fidgeting? could you have been fidgeting? could he have been fidgeting? could we have been fidgeting? could you have been fidgeting? could they have been fidgeting?
Interro-negative form
Simple form
couldn't I fidget? couldn't you fidget? couldn't he fidget? couldn't we fidget? couldn't you fidget? couldn't they fidget?
V-ing form
couldn't I be fidgeting? couldn't you be fidgeting? couldn't he be fidgeting? couldn't we be fidgeting? couldn't you be fidgeting? couldn't they be fidgeting?
Perfect
couldn't I have fidgeted? couldn't you have fidgeted? couldn't he have fidgeted? couldn't we have fidgeted? couldn't you have fidgeted? couldn't they have fidgeted?
V-ing perfect
couldn't I have been fidgeting? couldn't you have been fidgeting? couldn't he have been fidgeting? couldn't we have been fidgeting? couldn't you have been fidgeting? couldn't they have been fidgeting?