must interweave
Irregular verb: interweave - interwove- interwoven

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must interweave
you must interweave
he must interweave
we must interweave
you must interweave
they must interweave 	I must be interweaving
you must be interweaving
he must be interweaving
we must be interweaving
you must be interweaving
they must be interweaving	I must have interwoven
you must have interwoven
he must have interwoven
we must have interwoven
you must have interwoven
they must have interwoven	I must have been interweaving
you must have been interweaving
he must have been interweaving
we must have been interweaving
you must have been interweaving
they must have been interweaving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not interweave
you must not interweave
he must not interweave
we must not interweave
you must not interweave
they must not interweave 	I must not be interweaving
you must not be interweaving
he must not be interweaving
we must not be interweaving
you must not be interweaving
they must not be interweaving	I must not have interwoven
you must not have interwoven
he must not have interwoven
we must not have interwoven
you must not have interwoven
they must not have interwoven	I must not have been interweaving
you must not have been interweaving
he must not have been interweaving
we must not have been interweaving
you must not have been interweaving
they must not have been interweaving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I interweave?
must you interweave?
must he interweave?
must we interweave?
must you interweave?
must they interweave? 	must I be interweaving?
must you be interweaving?
must he be interweaving?
must we be interweaving?
must you be interweaving?
must they be interweaving? 	must I have interwoven?
must you have interwoven?
must he have interwoven?
must we have interwoven?
must you have interwoven?
must they have interwoven? 	must I have been interweaving?
must you have been interweaving?
must he have been interweaving?
must we have been interweaving?
must you have been interweaving?
must they have been interweaving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not interweave?
must you not interweave?
must he not interweave?
must we not interweave?
must you not interweave?
must they not interweave? 	must I not be interweaving?
must you not be interweaving?
must he not be interweaving?
must we not be interweaving?
must you not be interweaving?
must they not be interweaving? 	must I not have interwoven?
must you not have interwoven?
must he not have interwoven?
must we not have interwoven?
must you not have interwoven?
must they not have interwoven? 	must I not have been interweaving?
must you not have been interweaving?
must he not have been interweaving?
must we not have been interweaving?
must you not have been interweaving?
must they not have been interweaving?