I can preappoint you can preappoint he can preappoint we can preappoint you can preappoint they can preappoint
V-ing form
I can be preappointing you can be preappointing he can be preappointing we can be preappointing you can be preappointing they can be preappointing
Perfect
I can have preappointed you can have preappointed he can have preappointed we can have preappointed you can have preappointed they can have preappointed
V-ing perfect
I can have been preappointing you can have been preappointing he can have been preappointing we can have been preappointing you can have been preappointing they can have been preappointing
Negation
Simple form
I cannot preappoint you cannot preappoint he cannot preappoint we cannot preappoint you cannot preappoint they cannot preappoint
V-ing form
I cannot be preappointing you cannot be preappointing he cannot be preappointing we cannot be preappointing you cannot be preappointing they cannot be preappointing
Perfect
I cannot have preappointed you cannot have preappointed he cannot have preappointed we cannot have preappointed you cannot have preappointed they cannot have preappointed
V-ing perfect
I cannot have been preappointing you cannot have been preappointing he cannot have been preappointing we cannot have been preappointing you cannot have been preappointing they cannot have been preappointing
Interrogative form
Simple form
can I preappoint? can you preappoint? can he preappoint? can we preappoint? can you preappoint? can they preappoint?
V-ing form
can I be preappointing? can you be preappointing? can he be preappointing? can we be preappointing? can you be preappointing? can they be preappointing?
Perfect
can I have preappointed? can you have preappointed? can he have preappointed? can we have preappointed? can you have preappointed? can they have preappointed?
V-ing perfect
can I have been preappointing? can you have been preappointing? can he have been preappointing? can we have been preappointing? can you have been preappointing? can they have been preappointing?
Interro-negative form
Simple form
can I not preappoint? can you not preappoint? can he not preappoint? can we not preappoint? can you not preappoint? can they not preappoint?
V-ing form
can I not be preappointing? can you not be preappointing? can he not be preappointing? can we not be preappointing? can you not be preappointing? can they not be preappointing?
Perfect
can I not have preappointed? can you not have preappointed? can he not have preappointed? can we not have preappointed? can you not have preappointed? can they not have preappointed?
V-ing perfect
can I not have been preappointing? can you not have been preappointing? can he not have been preappointing? can we not have been preappointing? can you not have been preappointing? can they not have been preappointing?