I can fluster you can fluster he can fluster we can fluster you can fluster they can fluster
V-ing form
I can be flustering you can be flustering he can be flustering we can be flustering you can be flustering they can be flustering
Perfect
I can have flustered you can have flustered he 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 he 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 he 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 he 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 he 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 he 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 he fluster? can we fluster? can you fluster? can they fluster?
V-ing form
can I be flustering? can you be flustering? can he be flustering? can we be flustering? can you be flustering? can they be flustering?
Perfect
can I have flustered? can you have flustered? can he 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 he 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 he 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 he 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 he 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 he have been flustering? can't we have been flustering? can't you have been flustering? can't they have been flustering?