I can halter you can halter he can halter we can halter you can halter they can halter
V-ing form
I can be haltering you can be haltering he can be haltering we can be haltering you can be haltering they can be haltering
Perfect
I can have haltered you can have haltered he can have haltered we can have haltered you can have haltered they can have haltered
V-ing perfect
I can have been haltering you can have been haltering he can have been haltering we can have been haltering you can have been haltering they can have been haltering
Negation
Simple form
I cannot halter you cannot halter he cannot halter we cannot halter you cannot halter they cannot halter
V-ing form
I cannot be haltering you cannot be haltering he cannot be haltering we cannot be haltering you cannot be haltering they cannot be haltering
Perfect
I cannot have haltered you cannot have haltered he cannot have haltered we cannot have haltered you cannot have haltered they cannot have haltered
V-ing perfect
I cannot have been haltering you cannot have been haltering he cannot have been haltering we cannot have been haltering you cannot have been haltering they cannot have been haltering
Interrogative form
Simple form
can I halter? can you halter? can he halter? can we halter? can you halter? can they halter?
V-ing form
can I be haltering? can you be haltering? can he be haltering? can we be haltering? can you be haltering? can they be haltering?
Perfect
can I have haltered? can you have haltered? can he have haltered? can we have haltered? can you have haltered? can they have haltered?
V-ing perfect
can I have been haltering? can you have been haltering? can he have been haltering? can we have been haltering? can you have been haltering? can they have been haltering?
Interro-negative form
Simple form
can I not halter? can you not halter? can he not halter? can we not halter? can you not halter? can they not halter?
V-ing form
can I not be haltering? can you not be haltering? can he not be haltering? can we not be haltering? can you not be haltering? can they not be haltering?
Perfect
can I not have haltered? can you not have haltered? can he not have haltered? can we not have haltered? can you not have haltered? can they not have haltered?
V-ing perfect
can I not have been haltering? can you not have been haltering? can he not have been haltering? can we not have been haltering? can you not have been haltering? can they not have been haltering?