I can fluster you can fluster she can fluster we can fluster you can fluster they can fluster
V-ing form
I can be flustering you can be flustering she can be flustering we can be flustering you can be flustering they can be flustering
Perfect
I can have flustered you can have flustered she can have flustered we can have flustered you can have flustered they can have flustered
V-ing perfect
I can have been flustering you can have been flustering she can have been flustering we can have been flustering you can have been flustering they can have been flustering
Negation
Simple form
I can't fluster you can't fluster she can't fluster we can't fluster you can't fluster they can't fluster
V-ing form
I can't be flustering you can't be flustering she can't be flustering we can't be flustering you can't be flustering they can't be flustering
Perfect
I can't have flustered you can't have flustered she can't have flustered we can't have flustered you can't have flustered they can't have flustered
V-ing perfect
I can't have been flustering you can't have been flustering she can't have been flustering we can't have been flustering you can't have been flustering they can't have been flustering
Interrogative form
Simple form
can I fluster? can you fluster? can she fluster? can we fluster? can you fluster? can they fluster?
V-ing form
can I be flustering? can you be flustering? can she be flustering? can we be flustering? can you be flustering? can they be flustering?
Perfect
can I have flustered? can you have flustered? can she have flustered? can we have flustered? can you have flustered? can they have flustered?
V-ing perfect
can I have been flustering? can you have been flustering? can she have been flustering? can we have been flustering? can you have been flustering? can they have been flustering?
Interro-negative form
Simple form
can't I fluster? can't you fluster? can't she fluster? can't we fluster? can't you fluster? can't they fluster?
V-ing form
can't I be flustering? can't you be flustering? can't she be flustering? can't we be flustering? can't you be flustering? can't they be flustering?
Perfect
can't I have flustered? can't you have flustered? can't she have flustered? can't we have flustered? can't you have flustered? can't they have flustered?
V-ing perfect
can't I have been flustering? can't you have been flustering? can't she have been flustering? can't we have been flustering? can't you have been flustering? can't they have been flustering?