Conjugación del verbo inglés
MUST CONTRIBUTE

Verbo regular: contribute - contributed - contributed

Afirmación

Forma simple	Forma con V-ing
I must contribute you must contribute he must contribute we must contribute you must contribute they must contribute	I must be contributing you must be contributing he must be contributing we must be contributing you must be contributing they must be contributing
Perfecto	Perfecto con V-ing
I must have contributed you must have contributed he must have contributed we must have contributed you must have contributed they must have contributed	I must have been contributing you must have been contributing he must have been contributing we must have been contributing you must have been contributing they must have been contributing

Negación

Forma simple	Forma con V-ing
I mustn't contribute you mustn't contribute he mustn't contribute we mustn't contribute you mustn't contribute they mustn't contribute	I mustn't be contributing you mustn't be contributing he mustn't be contributing we mustn't be contributing you mustn't be contributing they mustn't be contributing
Perfecto	Perfecto con V-ing
I mustn't have contributed you mustn't have contributed he mustn't have contributed we mustn't have contributed you mustn't have contributed they mustn't have contributed	I mustn't have been contributing you mustn't have been contributing he mustn't have been contributing we mustn't have been contributing you mustn't have been contributing they mustn't have been contributing

Forma interrogativa

Forma simple	Forma con V-ing
must I contribute? must you contribute? must he contribute? must we contribute? must you contribute? must they contribute?	must I be contributing? must you be contributing? must he be contributing? must we be contributing? must you be contributing? must they be contributing?
Perfecto	Perfecto con V-ing
must I have contributed? must you have contributed? must he have contributed? must we have contributed? must you have contributed? must they have contributed?	must I have been contributing? must you have been contributing? must he have been contributing? must we have been contributing? must you have been contributing? must they have been contributing?

Forma interro-negativa

Forma simple	Forma con V-ing
mustn't I contribute? mustn't you contribute? mustn't he contribute? mustn't we contribute? mustn't you contribute? mustn't they contribute?	mustn't I be contributing? mustn't you be contributing? mustn't he be contributing? mustn't we be contributing? mustn't you be contributing? mustn't they be contributing?
Perfecto	Perfecto con V-ing
mustn't I have contributed? mustn't you have contributed? mustn't he have contributed? mustn't we have contributed? mustn't you have contributed? mustn't they have contributed?	mustn't I have been contributing? mustn't you have been contributing? mustn't he have been contributing? mustn't we have been contributing? mustn't you have been contributing? mustn't they have been contributing?