must chunk
Regular verb: chunk - chunked- chunked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chunk
you must chunk
he must chunk
we must chunk
you must chunk
they must chunk 	I must be chunking
you must be chunking
he must be chunking
we must be chunking
you must be chunking
they must be chunking	I must have chunked
you must have chunked
he must have chunked
we must have chunked
you must have chunked
they must have chunked	I must have been chunking
you must have been chunking
he must have been chunking
we must have been chunking
you must have been chunking
they must have been chunking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not chunk
you must not chunk
he must not chunk
we must not chunk
you must not chunk
they must not chunk 	I must not be chunking
you must not be chunking
he must not be chunking
we must not be chunking
you must not be chunking
they must not be chunking	I must not have chunked
you must not have chunked
he must not have chunked
we must not have chunked
you must not have chunked
they must not have chunked	I must not have been chunking
you must not have been chunking
he must not have been chunking
we must not have been chunking
you must not have been chunking
they must not have been chunking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chunk?
must you chunk?
must he chunk?
must we chunk?
must you chunk?
must they chunk? 	must I be chunking?
must you be chunking?
must he be chunking?
must we be chunking?
must you be chunking?
must they be chunking? 	must I have chunked?
must you have chunked?
must he have chunked?
must we have chunked?
must you have chunked?
must they have chunked? 	must I have been chunking?
must you have been chunking?
must he have been chunking?
must we have been chunking?
must you have been chunking?
must they have been chunking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not chunk?
must you not chunk?
must he not chunk?
must we not chunk?
must you not chunk?
must they not chunk? 	must I not be chunking?
must you not be chunking?
must he not be chunking?
must we not be chunking?
must you not be chunking?
must they not be chunking? 	must I not have chunked?
must you not have chunked?
must he not have chunked?
must we not have chunked?
must you not have chunked?
must they not have chunked? 	must I not have been chunking?
must you not have been chunking?
must he not have been chunking?
must we not have been chunking?
must you not have been chunking?
must they not have been chunking?