I can fiddle you can fiddle she can fiddle we can fiddle you can fiddle they can fiddle
V-ing form
I can be fiddling you can be fiddling she can be fiddling we can be fiddling you can be fiddling they can be fiddling
Perfect
I can have fiddled you can have fiddled she can have fiddled we can have fiddled you can have fiddled they can have fiddled
V-ing perfect
I can have been fiddling you can have been fiddling she can have been fiddling we can have been fiddling you can have been fiddling they can have been fiddling
Negation
Simple form
I can't fiddle you can't fiddle she can't fiddle we can't fiddle you can't fiddle they can't fiddle
V-ing form
I can't be fiddling you can't be fiddling she can't be fiddling we can't be fiddling you can't be fiddling they can't be fiddling
Perfect
I can't have fiddled you can't have fiddled she can't have fiddled we can't have fiddled you can't have fiddled they can't have fiddled
V-ing perfect
I can't have been fiddling you can't have been fiddling she can't have been fiddling we can't have been fiddling you can't have been fiddling they can't have been fiddling
Interrogative form
Simple form
can I fiddle? can you fiddle? can she fiddle? can we fiddle? can you fiddle? can they fiddle?
V-ing form
can I be fiddling? can you be fiddling? can she be fiddling? can we be fiddling? can you be fiddling? can they be fiddling?
Perfect
can I have fiddled? can you have fiddled? can she have fiddled? can we have fiddled? can you have fiddled? can they have fiddled?
V-ing perfect
can I have been fiddling? can you have been fiddling? can she have been fiddling? can we have been fiddling? can you have been fiddling? can they have been fiddling?
Interro-negative form
Simple form
can't I fiddle? can't you fiddle? can't she fiddle? can't we fiddle? can't you fiddle? can't they fiddle?
V-ing form
can't I be fiddling? can't you be fiddling? can't she be fiddling? can't we be fiddling? can't you be fiddling? can't they be fiddling?
Perfect
can't I have fiddled? can't you have fiddled? can't she have fiddled? can't we have fiddled? can't you have fiddled? can't they have fiddled?
V-ing perfect
can't I have been fiddling? can't you have been fiddling? can't she have been fiddling? can't we have been fiddling? can't you have been fiddling? can't they have been fiddling?