I can clinch you can clinch he can clinch we can clinch you can clinch they can clinch
V-ing form
I can be clinching you can be clinching he can be clinching we can be clinching you can be clinching they can be clinching
Perfect
I can have clinched you can have clinched he can have clinched we can have clinched you can have clinched they can have clinched
V-ing perfect
I can have been clinching you can have been clinching he can have been clinching we can have been clinching you can have been clinching they can have been clinching
Negation
Simple form
I can't clinch you can't clinch he can't clinch we can't clinch you can't clinch they can't clinch
V-ing form
I can't be clinching you can't be clinching he can't be clinching we can't be clinching you can't be clinching they can't be clinching
Perfect
I can't have clinched you can't have clinched he can't have clinched we can't have clinched you can't have clinched they can't have clinched
V-ing perfect
I can't have been clinching you can't have been clinching he can't have been clinching we can't have been clinching you can't have been clinching they can't have been clinching
Interrogative form
Simple form
can I clinch? can you clinch? can he clinch? can we clinch? can you clinch? can they clinch?
V-ing form
can I be clinching? can you be clinching? can he be clinching? can we be clinching? can you be clinching? can they be clinching?
Perfect
can I have clinched? can you have clinched? can he have clinched? can we have clinched? can you have clinched? can they have clinched?
V-ing perfect
can I have been clinching? can you have been clinching? can he have been clinching? can we have been clinching? can you have been clinching? can they have been clinching?
Interro-negative form
Simple form
can't I clinch? can't you clinch? can't he clinch? can't we clinch? can't you clinch? can't they clinch?
V-ing form
can't I be clinching? can't you be clinching? can't he be clinching? can't we be clinching? can't you be clinching? can't they be clinching?
Perfect
can't I have clinched? can't you have clinched? can't he have clinched? can't we have clinched? can't you have clinched? can't they have clinched?
V-ing perfect
can't I have been clinching? can't you have been clinching? can't he have been clinching? can't we have been clinching? can't you have been clinching? can't they have been clinching?