I can halter you can halter she can halter we can halter you can halter they can halter
V-ing form
I can be haltering you can be haltering she can be haltering we can be haltering you can be haltering they can be haltering
Perfect
I can have haltered you can have haltered she 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 she 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 she cannot halter we cannot halter you cannot halter they cannot halter
V-ing form
I cannot be haltering you cannot be haltering she cannot be haltering we cannot be haltering you cannot be haltering they cannot be haltering
Perfect
I cannot have haltered you cannot have haltered she 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 she 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 she halter? can we halter? can you halter? can they halter?
V-ing form
can I be haltering? can you be haltering? can she be haltering? can we be haltering? can you be haltering? can they be haltering?
Perfect
can I have haltered? can you have haltered? can she 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 she 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 she 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 she 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 she 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 she not have been haltering? can we not have been haltering? can you not have been haltering? can they not have been haltering?