I can clutch you can clutch he can clutch we can clutch you can clutch they can clutch
V-ing form
I can be clutching you can be clutching he can be clutching we can be clutching you can be clutching they can be clutching
Perfect
I can have clutched you can have clutched he can have clutched we can have clutched you can have clutched they can have clutched
V-ing perfect
I can have been clutching you can have been clutching he can have been clutching we can have been clutching you can have been clutching they can have been clutching
Negation
Simple form
I can't clutch you can't clutch he can't clutch we can't clutch you can't clutch they can't clutch
V-ing form
I can't be clutching you can't be clutching he can't be clutching we can't be clutching you can't be clutching they can't be clutching
Perfect
I can't have clutched you can't have clutched he can't have clutched we can't have clutched you can't have clutched they can't have clutched
V-ing perfect
I can't have been clutching you can't have been clutching he can't have been clutching we can't have been clutching you can't have been clutching they can't have been clutching
Interrogative form
Simple form
can I clutch? can you clutch? can he clutch? can we clutch? can you clutch? can they clutch?
V-ing form
can I be clutching? can you be clutching? can he be clutching? can we be clutching? can you be clutching? can they be clutching?
Perfect
can I have clutched? can you have clutched? can he have clutched? can we have clutched? can you have clutched? can they have clutched?
V-ing perfect
can I have been clutching? can you have been clutching? can he have been clutching? can we have been clutching? can you have been clutching? can they have been clutching?
Interro-negative form
Simple form
can't I clutch? can't you clutch? can't he clutch? can't we clutch? can't you clutch? can't they clutch?
V-ing form
can't I be clutching? can't you be clutching? can't he be clutching? can't we be clutching? can't you be clutching? can't they be clutching?
Perfect
can't I have clutched? can't you have clutched? can't he have clutched? can't we have clutched? can't you have clutched? can't they have clutched?
V-ing perfect
can't I have been clutching? can't you have been clutching? can't he have been clutching? can't we have been clutching? can't you have been clutching? can't they have been clutching?