I must conjecture you must conjecture he must conjecture we must conjecture you must conjecture they must conjecture
V-ing form
I must be conjecturing you must be conjecturing he must be conjecturing we must be conjecturing you must be conjecturing they must be conjecturing
Perfect
I must have conjectured you must have conjectured he must have conjectured we must have conjectured you must have conjectured they must have conjectured
V-ing perfect
I must have been conjecturing you must have been conjecturing he must have been conjecturing we must have been conjecturing you must have been conjecturing they must have been conjecturing
Negation
Simple form
I mustn't conjecture you mustn't conjecture he mustn't conjecture we mustn't conjecture you mustn't conjecture they mustn't conjecture
V-ing form
I mustn't be conjecturing you mustn't be conjecturing he mustn't be conjecturing we mustn't be conjecturing you mustn't be conjecturing they mustn't be conjecturing
Perfect
I mustn't have conjectured you mustn't have conjectured he mustn't have conjectured we mustn't have conjectured you mustn't have conjectured they mustn't have conjectured
V-ing perfect
I mustn't have been conjecturing you mustn't have been conjecturing he mustn't have been conjecturing we mustn't have been conjecturing you mustn't have been conjecturing they mustn't have been conjecturing
Interrogative form
Simple form
must I conjecture? must you conjecture? must he conjecture? must we conjecture? must you conjecture? must they conjecture?
V-ing form
must I be conjecturing? must you be conjecturing? must he be conjecturing? must we be conjecturing? must you be conjecturing? must they be conjecturing?
Perfect
must I have conjectured? must you have conjectured? must he have conjectured? must we have conjectured? must you have conjectured? must they have conjectured?
V-ing perfect
must I have been conjecturing? must you have been conjecturing? must he have been conjecturing? must we have been conjecturing? must you have been conjecturing? must they have been conjecturing?
Interro-negative form
Simple form
mustn't I conjecture? mustn't you conjecture? mustn't he conjecture? mustn't we conjecture? mustn't you conjecture? mustn't they conjecture?
V-ing form
mustn't I be conjecturing? mustn't you be conjecturing? mustn't he be conjecturing? mustn't we be conjecturing? mustn't you be conjecturing? mustn't they be conjecturing?
Perfect
mustn't I have conjectured? mustn't you have conjectured? mustn't he have conjectured? mustn't we have conjectured? mustn't you have conjectured? mustn't they have conjectured?
V-ing perfect
mustn't I have been conjecturing? mustn't you have been conjecturing? mustn't he have been conjecturing? mustn't we have been conjecturing? mustn't you have been conjecturing? mustn't they have been conjecturing?