can precalculate
Regular verb: precalculate - precalculated- precalculated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can precalculate
you can precalculate
he can precalculate
we can precalculate
you can precalculate
they can precalculate 	I can be precalculating
you can be precalculating
he can be precalculating
we can be precalculating
you can be precalculating
they can be precalculating	I can have precalculated
you can have precalculated
he can have precalculated
we can have precalculated
you can have precalculated
they can have precalculated	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 	V-ing form 	Perfect 	V-ing perfect 	
I can't precalculate
you can't precalculate
he can't precalculate
we can't precalculate
you can't precalculate
they can't precalculate 	I can't be precalculating
you can't be precalculating
he can't be precalculating
we can't be precalculating
you can't be precalculating
they can't be precalculating	I can't have precalculated
you can't have precalculated
he can't have precalculated
we can't have precalculated
you can't have precalculated
they can't have precalculated	I can't have been precalculating
you can't have been precalculating
he can't have been precalculating
we can't have been precalculating
you can't have been precalculating
they can't have been precalculating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I precalculate?
can you precalculate?
can he precalculate?
can we precalculate?
can you precalculate?
can they precalculate? 	can I be precalculating?
can you be precalculating?
can he be precalculating?
can we be precalculating?
can you be precalculating?
can they be precalculating? 	can I have precalculated?
can you have precalculated?
can he have precalculated?
can we have precalculated?
can you have precalculated?
can they have precalculated? 	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 	V-ing form 	Perfect 	V-ing perfect 	
can't I precalculate?
can't you precalculate?
can't he precalculate?
can't we precalculate?
can't you precalculate?
can't they precalculate? 	can't I be precalculating?
can't you be precalculating?
can't he be precalculating?
can't we be precalculating?
can't you be precalculating?
can't they be precalculating? 	can't I have precalculated?
can't you have precalculated?
can't he have precalculated?
can't we have precalculated?
can't you have precalculated?
can't they have precalculated? 	can't I have been precalculating?
can't you have been precalculating?
can't he have been precalculating?
can't we have been precalculating?
can't you have been precalculating?
can't they have been precalculating?