must fence
Regular verb: fence - fenced- fenced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fence
you must fence
she must fence
we must fence
you must fence
they must fence 	I must be fencing
you must be fencing
she must be fencing
we must be fencing
you must be fencing
they must be fencing	I must have fenced
you must have fenced
she must have fenced
we must have fenced
you must have fenced
they must have fenced	I must have been fencing
you must have been fencing
she must have been fencing
we must have been fencing
you must have been fencing
they must have been fencing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not fence
you must not fence
she must not fence
we must not fence
you must not fence
they must not fence 	I must not be fencing
you must not be fencing
she must not be fencing
we must not be fencing
you must not be fencing
they must not be fencing	I must not have fenced
you must not have fenced
she must not have fenced
we must not have fenced
you must not have fenced
they must not have fenced	I must not have been fencing
you must not have been fencing
she must not have been fencing
we must not have been fencing
you must not have been fencing
they must not have been fencing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fence?
must you fence?
must she fence?
must we fence?
must you fence?
must they fence? 	must I be fencing?
must you be fencing?
must she be fencing?
must we be fencing?
must you be fencing?
must they be fencing? 	must I have fenced?
must you have fenced?
must she have fenced?
must we have fenced?
must you have fenced?
must they have fenced? 	must I have been fencing?
must you have been fencing?
must she have been fencing?
must we have been fencing?
must you have been fencing?
must they have been fencing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not fence?
must you not fence?
must she not fence?
must we not fence?
must you not fence?
must they not fence? 	must I not be fencing?
must you not be fencing?
must she not be fencing?
must we not be fencing?
must you not be fencing?
must they not be fencing? 	must I not have fenced?
must you not have fenced?
must she not have fenced?
must we not have fenced?
must you not have fenced?
must they not have fenced? 	must I not have been fencing?
must you not have been fencing?
must she not have been fencing?
must we not have been fencing?
must you not have been fencing?
must they not have been fencing?