I can precalculate you can precalculate he can precalculate we can precalculate you can precalculate they can precalculate
V-ing form
I can be precalculating you can be precalculating he can be precalculating we can be precalculating you can be precalculating they can be precalculating
Perfect
I can have precalculated you can have precalculated he can have precalculated we can have precalculated you can have precalculated they can have precalculated
V-ing perfect
I can have been precalculating you can have been precalculating he can have been precalculating we can have been precalculating you can have been precalculating they can have been precalculating
Negation
Simple form
I cannot precalculate you cannot precalculate he cannot precalculate we cannot precalculate you cannot precalculate they cannot precalculate
V-ing form
I cannot be precalculating you cannot be precalculating he cannot be precalculating we cannot be precalculating you cannot be precalculating they cannot be precalculating
Perfect
I cannot have precalculated you cannot have precalculated he cannot have precalculated we cannot have precalculated you cannot have precalculated they cannot have precalculated
V-ing perfect
I cannot have been precalculating you cannot have been precalculating he cannot have been precalculating we cannot have been precalculating you cannot have been precalculating they cannot have been precalculating
Interrogative form
Simple form
can I precalculate? can you precalculate? can he precalculate? can we precalculate? can you precalculate? can they precalculate?
V-ing form
can I be precalculating? can you be precalculating? can he be precalculating? can we be precalculating? can you be precalculating? can they be precalculating?
Perfect
can I have precalculated? can you have precalculated? can he have precalculated? can we have precalculated? can you have precalculated? can they have precalculated?
V-ing perfect
can I have been precalculating? can you have been precalculating? can he have been precalculating? can we have been precalculating? can you have been precalculating? can they have been precalculating?
Interro-negative form
Simple form
can I not precalculate? can you not precalculate? can he not precalculate? can we not precalculate? can you not precalculate? can they not precalculate?
V-ing form
can I not be precalculating? can you not be precalculating? can he not be precalculating? can we not be precalculating? can you not be precalculating? can they not be precalculating?
Perfect
can I not have precalculated? can you not have precalculated? can he not have precalculated? can we not have precalculated? can you not have precalculated? can they not have precalculated?
V-ing perfect
can I not have been precalculating? can you not have been precalculating? can he not have been precalculating? can we not have been precalculating? can you not have been precalculating? can they not have been precalculating?