must help
Regular verb: help - helped- helped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must help
you must help
she must help
we must help
you must help
they must help 	I must be helping
you must be helping
she must be helping
we must be helping
you must be helping
they must be helping	I must have helped
you must have helped
she must have helped
we must have helped
you must have helped
they must have helped	I must have been helping
you must have been helping
she must have been helping
we must have been helping
you must have been helping
they must have been helping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not help
you must not help
she must not help
we must not help
you must not help
they must not help 	I must not be helping
you must not be helping
she must not be helping
we must not be helping
you must not be helping
they must not be helping	I must not have helped
you must not have helped
she must not have helped
we must not have helped
you must not have helped
they must not have helped	I must not have been helping
you must not have been helping
she must not have been helping
we must not have been helping
you must not have been helping
they must not have been helping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I help?
must you help?
must she help?
must we help?
must you help?
must they help? 	must I be helping?
must you be helping?
must she be helping?
must we be helping?
must you be helping?
must they be helping? 	must I have helped?
must you have helped?
must she have helped?
must we have helped?
must you have helped?
must they have helped? 	must I have been helping?
must you have been helping?
must she have been helping?
must we have been helping?
must you have been helping?
must they have been helping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not help?
must you not help?
must she not help?
must we not help?
must you not help?
must they not help? 	must I not be helping?
must you not be helping?
must she not be helping?
must we not be helping?
must you not be helping?
must they not be helping? 	must I not have helped?
must you not have helped?
must she not have helped?
must we not have helped?
must you not have helped?
must they not have helped? 	must I not have been helping?
must you not have been helping?
must she not have been helping?
must we not have been helping?
must you not have been helping?
must they not have been helping?