English verb conjugation
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Regular verb: recommend - recommended - recommended

Affirmation

Simple form	V-ing form
I must recommend you must recommend he must recommend we must recommend you must recommend they must recommend	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	V-ing 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	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	V-ing form
I must not recommend you must not recommend he must not recommend we must not recommend you must not recommend they must not recommend	I must not be recommending you must not be recommending he must not be recommending we must not be recommending you must not be recommending they must not be recommending
Perfect	V-ing perfect
I must not have recommended you must not have recommended he must not have recommended we must not have recommended you must not have recommended they must not have recommended	I must not have been recommending you must not have been recommending he must not have been recommending we must not have been recommending you must not have been recommending they must not have been recommending

Interrogative form

Simple form	V-ing form
must I recommend? must you recommend? must he recommend? must we recommend? must you recommend? must they recommend?	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	V-ing 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?	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	V-ing form
must I not recommend? must you not recommend? must he not recommend? must we not recommend? must you not recommend? must they not recommend?	must I not be recommending? must you not be recommending? must he not be recommending? must we not be recommending? must you not be recommending? must they not be recommending?
Perfect	V-ing perfect
must I not have recommended? must you not have recommended? must he not have recommended? must we not have recommended? must you not have recommended? must they not have recommended?	must I not have been recommending? must you not have been recommending? must he not have been recommending? must we not have been recommending? must you not have been recommending? must they not have been recommending?