I must interrogate you must interrogate she must interrogate we must interrogate you must interrogate they must interrogate
V-ing form
I must be interrogating you must be interrogating she must be interrogating we must be interrogating you must be interrogating they must be interrogating
Perfect
I must have interrogated you must have interrogated she must have interrogated we must have interrogated you must have interrogated they must have interrogated
V-ing perfect
I must have been interrogating you must have been interrogating she must have been interrogating we must have been interrogating you must have been interrogating they must have been interrogating
Negation
Simple form
I mustn't interrogate you mustn't interrogate she mustn't interrogate we mustn't interrogate you mustn't interrogate they mustn't interrogate
V-ing form
I mustn't be interrogating you mustn't be interrogating she mustn't be interrogating we mustn't be interrogating you mustn't be interrogating they mustn't be interrogating
Perfect
I mustn't have interrogated you mustn't have interrogated she mustn't have interrogated we mustn't have interrogated you mustn't have interrogated they mustn't have interrogated
V-ing perfect
I mustn't have been interrogating you mustn't have been interrogating she mustn't have been interrogating we mustn't have been interrogating you mustn't have been interrogating they mustn't have been interrogating
Interrogative form
Simple form
must I interrogate? must you interrogate? must she interrogate? must we interrogate? must you interrogate? must they interrogate?
V-ing form
must I be interrogating? must you be interrogating? must she be interrogating? must we be interrogating? must you be interrogating? must they be interrogating?
Perfect
must I have interrogated? must you have interrogated? must she have interrogated? must we have interrogated? must you have interrogated? must they have interrogated?
V-ing perfect
must I have been interrogating? must you have been interrogating? must she have been interrogating? must we have been interrogating? must you have been interrogating? must they have been interrogating?
Interro-negative form
Simple form
mustn't I interrogate? mustn't you interrogate? mustn't she interrogate? mustn't we interrogate? mustn't you interrogate? mustn't they interrogate?
V-ing form
mustn't I be interrogating? mustn't you be interrogating? mustn't she be interrogating? mustn't we be interrogating? mustn't you be interrogating? mustn't they be interrogating?
Perfect
mustn't I have interrogated? mustn't you have interrogated? mustn't she have interrogated? mustn't we have interrogated? mustn't you have interrogated? mustn't they have interrogated?
V-ing perfect
mustn't I have been interrogating? mustn't you have been interrogating? mustn't she have been interrogating? mustn't we have been interrogating? mustn't you have been interrogating? mustn't they have been interrogating?