I can kayak you can kayak he can kayak we can kayak you can kayak they can kayak
V-ing form
I can be kayaking you can be kayaking he can be kayaking we can be kayaking you can be kayaking they can be kayaking
Perfect
I can have kayaked you can have kayaked he can have kayaked we can have kayaked you can have kayaked they can have kayaked
V-ing perfect
I can have been kayaking you can have been kayaking he can have been kayaking we can have been kayaking you can have been kayaking they can have been kayaking
Negation
Simple form
I can't kayak you can't kayak he can't kayak we can't kayak you can't kayak they can't kayak
V-ing form
I can't be kayaking you can't be kayaking he can't be kayaking we can't be kayaking you can't be kayaking they can't be kayaking
Perfect
I can't have kayaked you can't have kayaked he can't have kayaked we can't have kayaked you can't have kayaked they can't have kayaked
V-ing perfect
I can't have been kayaking you can't have been kayaking he can't have been kayaking we can't have been kayaking you can't have been kayaking they can't have been kayaking
Interrogative form
Simple form
can I kayak? can you kayak? can he kayak? can we kayak? can you kayak? can they kayak?
V-ing form
can I be kayaking? can you be kayaking? can he be kayaking? can we be kayaking? can you be kayaking? can they be kayaking?
Perfect
can I have kayaked? can you have kayaked? can he have kayaked? can we have kayaked? can you have kayaked? can they have kayaked?
V-ing perfect
can I have been kayaking? can you have been kayaking? can he have been kayaking? can we have been kayaking? can you have been kayaking? can they have been kayaking?
Interro-negative form
Simple form
can't I kayak? can't you kayak? can't he kayak? can't we kayak? can't you kayak? can't they kayak?
V-ing form
can't I be kayaking? can't you be kayaking? can't he be kayaking? can't we be kayaking? can't you be kayaking? can't they be kayaking?
Perfect
can't I have kayaked? can't you have kayaked? can't he have kayaked? can't we have kayaked? can't you have kayaked? can't they have kayaked?
V-ing perfect
can't I have been kayaking? can't you have been kayaking? can't he have been kayaking? can't we have been kayaking? can't you have been kayaking? can't they have been kayaking?