I can four-flush you can four-flush he can four-flush we can four-flush you can four-flush they can four-flush
V-ing form
I can be four-flushing you can be four-flushing he can be four-flushing we can be four-flushing you can be four-flushing they can be four-flushing
Perfect
I can have four-flushed you can have four-flushed he can have four-flushed we can have four-flushed you can have four-flushed they can have four-flushed
V-ing perfect
I can have been four-flushing you can have been four-flushing he can have been four-flushing we can have been four-flushing you can have been four-flushing they can have been four-flushing
Negation
Simple form
I can't four-flush you can't four-flush he can't four-flush we can't four-flush you can't four-flush they can't four-flush
V-ing form
I can't be four-flushing you can't be four-flushing he can't be four-flushing we can't be four-flushing you can't be four-flushing they can't be four-flushing
Perfect
I can't have four-flushed you can't have four-flushed he can't have four-flushed we can't have four-flushed you can't have four-flushed they can't have four-flushed
V-ing perfect
I can't have been four-flushing you can't have been four-flushing he can't have been four-flushing we can't have been four-flushing you can't have been four-flushing they can't have been four-flushing
Interrogative form
Simple form
can I four-flush? can you four-flush? can he four-flush? can we four-flush? can you four-flush? can they four-flush?
V-ing form
can I be four-flushing? can you be four-flushing? can he be four-flushing? can we be four-flushing? can you be four-flushing? can they be four-flushing?
Perfect
can I have four-flushed? can you have four-flushed? can he have four-flushed? can we have four-flushed? can you have four-flushed? can they have four-flushed?
V-ing perfect
can I have been four-flushing? can you have been four-flushing? can he have been four-flushing? can we have been four-flushing? can you have been four-flushing? can they have been four-flushing?
Interro-negative form
Simple form
can't I four-flush? can't you four-flush? can't he four-flush? can't we four-flush? can't you four-flush? can't they four-flush?
V-ing form
can't I be four-flushing? can't you be four-flushing? can't he be four-flushing? can't we be four-flushing? can't you be four-flushing? can't they be four-flushing?
Perfect
can't I have four-flushed? can't you have four-flushed? can't he have four-flushed? can't we have four-flushed? can't you have four-flushed? can't they have four-flushed?
V-ing perfect
can't I have been four-flushing? can't you have been four-flushing? can't he have been four-flushing? can't we have been four-flushing? can't you have been four-flushing? can't they have been four-flushing?