must plane
Regular verb: plane - planed- planed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must plane
you must plane
she must plane
we must plane
you must plane
they must plane 	I must be planing
you must be planing
she must be planing
we must be planing
you must be planing
they must be planing	I must have planed
you must have planed
she must have planed
we must have planed
you must have planed
they must have planed	I must have been planing
you must have been planing
she must have been planing
we must have been planing
you must have been planing
they must have been planing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not plane
you must not plane
she must not plane
we must not plane
you must not plane
they must not plane 	I must not be planing
you must not be planing
she must not be planing
we must not be planing
you must not be planing
they must not be planing	I must not have planed
you must not have planed
she must not have planed
we must not have planed
you must not have planed
they must not have planed	I must not have been planing
you must not have been planing
she must not have been planing
we must not have been planing
you must not have been planing
they must not have been planing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I plane?
must you plane?
must she plane?
must we plane?
must you plane?
must they plane? 	must I be planing?
must you be planing?
must she be planing?
must we be planing?
must you be planing?
must they be planing? 	must I have planed?
must you have planed?
must she have planed?
must we have planed?
must you have planed?
must they have planed? 	must I have been planing?
must you have been planing?
must she have been planing?
must we have been planing?
must you have been planing?
must they have been planing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not plane?
must you not plane?
must she not plane?
must we not plane?
must you not plane?
must they not plane? 	must I not be planing?
must you not be planing?
must she not be planing?
must we not be planing?
must you not be planing?
must they not be planing? 	must I not have planed?
must you not have planed?
must she not have planed?
must we not have planed?
must you not have planed?
must they not have planed? 	must I not have been planing?
must you not have been planing?
must she not have been planing?
must we not have been planing?
must you not have been planing?
must they not have been planing?