must conceive
Regular verb: conceive - conceived- conceived

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must conceive
you must conceive
she must conceive
we must conceive
you must conceive
they must conceive 	I must be conceiving
you must be conceiving
she must be conceiving
we must be conceiving
you must be conceiving
they must be conceiving	I must have conceived
you must have conceived
she must have conceived
we must have conceived
you must have conceived
they must have conceived	I must have been conceiving
you must have been conceiving
she must have been conceiving
we must have been conceiving
you must have been conceiving
they must have been conceiving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't conceive
you mustn't conceive
she mustn't conceive
we mustn't conceive
you mustn't conceive
they mustn't conceive 	I mustn't be conceiving
you mustn't be conceiving
she mustn't be conceiving
we mustn't be conceiving
you mustn't be conceiving
they mustn't be conceiving	I mustn't have conceived
you mustn't have conceived
she mustn't have conceived
we mustn't have conceived
you mustn't have conceived
they mustn't have conceived	I mustn't have been conceiving
you mustn't have been conceiving
she mustn't have been conceiving
we mustn't have been conceiving
you mustn't have been conceiving
they mustn't have been conceiving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I conceive?
must you conceive?
must she conceive?
must we conceive?
must you conceive?
must they conceive? 	must I be conceiving?
must you be conceiving?
must she be conceiving?
must we be conceiving?
must you be conceiving?
must they be conceiving? 	must I have conceived?
must you have conceived?
must she have conceived?
must we have conceived?
must you have conceived?
must they have conceived? 	must I have been conceiving?
must you have been conceiving?
must she have been conceiving?
must we have been conceiving?
must you have been conceiving?
must they have been conceiving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I conceive?
mustn't you conceive?
mustn't she conceive?
mustn't we conceive?
mustn't you conceive?
mustn't they conceive? 	mustn't I be conceiving?
mustn't you be conceiving?
mustn't she be conceiving?
mustn't we be conceiving?
mustn't you be conceiving?
mustn't they be conceiving? 	mustn't I have conceived?
mustn't you have conceived?
mustn't she have conceived?
mustn't we have conceived?
mustn't you have conceived?
mustn't they have conceived? 	mustn't I have been conceiving?
mustn't you have been conceiving?
mustn't she have been conceiving?
mustn't we have been conceiving?
mustn't you have been conceiving?
mustn't they have been conceiving?