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