English verb conjugation
CAN PRECHECK

Regular verb: precheck - prechecked - prechecked

Affirmation

Simple form	V-ing form
I can precheck you can precheck she can precheck we can precheck you can precheck they can precheck	I can be prechecking you can be prechecking she can be prechecking we can be prechecking you can be prechecking they can be prechecking
Perfect	V-ing perfect
I can have prechecked you can have prechecked she can have prechecked we can have prechecked you can have prechecked they can have prechecked	I can have been prechecking you can have been prechecking she can have been prechecking we can have been prechecking you can have been prechecking they can have been prechecking

Negation

Simple form	V-ing form
I can't precheck you can't precheck she can't precheck we can't precheck you can't precheck they can't precheck	I can't be prechecking you can't be prechecking she can't be prechecking we can't be prechecking you can't be prechecking they can't be prechecking
Perfect	V-ing perfect
I can't have prechecked you can't have prechecked she can't have prechecked we can't have prechecked you can't have prechecked they can't have prechecked	I can't have been prechecking you can't have been prechecking she can't have been prechecking we can't have been prechecking you can't have been prechecking they can't have been prechecking

Interrogative form

Simple form	V-ing form
can I precheck? can you precheck? can she precheck? can we precheck? can you precheck? can they precheck?	can I be prechecking? can you be prechecking? can she be prechecking? can we be prechecking? can you be prechecking? can they be prechecking?
Perfect	V-ing perfect
can I have prechecked? can you have prechecked? can she have prechecked? can we have prechecked? can you have prechecked? can they have prechecked?	can I have been prechecking? can you have been prechecking? can she have been prechecking? can we have been prechecking? can you have been prechecking? can they have been prechecking?

Interro-negative form

Simple form	V-ing form
can't I precheck? can't you precheck? can't she precheck? can't we precheck? can't you precheck? can't they precheck?	can't I be prechecking? can't you be prechecking? can't she be prechecking? can't we be prechecking? can't you be prechecking? can't they be prechecking?
Perfect	V-ing perfect
can't I have prechecked? can't you have prechecked? can't she have prechecked? can't we have prechecked? can't you have prechecked? can't they have prechecked?	can't I have been prechecking? can't you have been prechecking? can't she have been prechecking? can't we have been prechecking? can't you have been prechecking? can't they have been prechecking?