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 could not fidget you could not fidget he could not fidget we could not fidget you could not fidget they could not fidget
V-ing form
I could not be fidgeting you could not be fidgeting he could not be fidgeting we could not be fidgeting you could not be fidgeting they could not be fidgeting
Perfect
I could not have fidgeted you could not have fidgeted he could not have fidgeted we could not have fidgeted you could not have fidgeted they could not have fidgeted
V-ing perfect
I could not have been fidgeting you could not have been fidgeting he could not have been fidgeting we could not have been fidgeting you could not have been fidgeting they could not 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
could I not fidget? could you not fidget? could he not fidget? could we not fidget? could you not fidget? could they not fidget?
V-ing form
could I not be fidgeting? could you not be fidgeting? could he not be fidgeting? could we not be fidgeting? could you not be fidgeting? could they not be fidgeting?
Perfect
could I not have fidgeted? could you not have fidgeted? could he not have fidgeted? could we not have fidgeted? could you not have fidgeted? could they not have fidgeted?
V-ing perfect
could I not have been fidgeting? could you not have been fidgeting? could he not have been fidgeting? could we not have been fidgeting? could you not have been fidgeting? could they not have been fidgeting?