I can squeak you can squeak she can squeak we can squeak you can squeak they can squeak
V-ing form
I can be squeaking you can be squeaking she can be squeaking we can be squeaking you can be squeaking they can be squeaking
Perfect
I can have squeaked you can have squeaked she can have squeaked we can have squeaked you can have squeaked they can have squeaked
V-ing perfect
I can have been squeaking you can have been squeaking she can have been squeaking we can have been squeaking you can have been squeaking they can have been squeaking
Negation
Simple form
I cannot squeak you cannot squeak she cannot squeak we cannot squeak you cannot squeak they cannot squeak
V-ing form
I cannot be squeaking you cannot be squeaking she cannot be squeaking we cannot be squeaking you cannot be squeaking they cannot be squeaking
Perfect
I cannot have squeaked you cannot have squeaked she cannot have squeaked we cannot have squeaked you cannot have squeaked they cannot have squeaked
V-ing perfect
I cannot have been squeaking you cannot have been squeaking she cannot have been squeaking we cannot have been squeaking you cannot have been squeaking they cannot have been squeaking
Interrogative form
Simple form
can I squeak? can you squeak? can she squeak? can we squeak? can you squeak? can they squeak?
V-ing form
can I be squeaking? can you be squeaking? can she be squeaking? can we be squeaking? can you be squeaking? can they be squeaking?
Perfect
can I have squeaked? can you have squeaked? can she have squeaked? can we have squeaked? can you have squeaked? can they have squeaked?
V-ing perfect
can I have been squeaking? can you have been squeaking? can she have been squeaking? can we have been squeaking? can you have been squeaking? can they have been squeaking?
Interro-negative form
Simple form
can I not squeak? can you not squeak? can she not squeak? can we not squeak? can you not squeak? can they not squeak?
V-ing form
can I not be squeaking? can you not be squeaking? can she not be squeaking? can we not be squeaking? can you not be squeaking? can they not be squeaking?
Perfect
can I not have squeaked? can you not have squeaked? can she not have squeaked? can we not have squeaked? can you not have squeaked? can they not have squeaked?
V-ing perfect
can I not have been squeaking? can you not have been squeaking? can she not have been squeaking? can we not have been squeaking? can you not have been squeaking? can they not have been squeaking?