Verbo regular: concentrate - concentrated - concentrated
Forma simple | Forma con V-ing |
I must concentrate you must concentrate he must concentrate we must concentrate you must concentrate they must concentrate | I must be concentrating you must be concentrating he must be concentrating we must be concentrating you must be concentrating they must be concentrating |
Perfecto | Perfecto con V-ing |
I must have concentrated you must have concentrated he must have concentrated we must have concentrated you must have concentrated they must have concentrated | I must have been concentrating you must have been concentrating he must have been concentrating we must have been concentrating you must have been concentrating they must have been concentrating |
Forma simple | Forma con V-ing |
I mustn't concentrate you mustn't concentrate he mustn't concentrate we mustn't concentrate you mustn't concentrate they mustn't concentrate | I mustn't be concentrating you mustn't be concentrating he mustn't be concentrating we mustn't be concentrating you mustn't be concentrating they mustn't be concentrating |
Perfecto | Perfecto con V-ing |
I mustn't have concentrated you mustn't have concentrated he mustn't have concentrated we mustn't have concentrated you mustn't have concentrated they mustn't have concentrated | I mustn't have been concentrating you mustn't have been concentrating he mustn't have been concentrating we mustn't have been concentrating you mustn't have been concentrating they mustn't have been concentrating |
Forma simple | Forma con V-ing |
must I concentrate? must you concentrate? must he concentrate? must we concentrate? must you concentrate? must they concentrate? | must I be concentrating? must you be concentrating? must he be concentrating? must we be concentrating? must you be concentrating? must they be concentrating? |
Perfecto | Perfecto con V-ing |
must I have concentrated? must you have concentrated? must he have concentrated? must we have concentrated? must you have concentrated? must they have concentrated? | must I have been concentrating? must you have been concentrating? must he have been concentrating? must we have been concentrating? must you have been concentrating? must they have been concentrating? |
Forma simple | Forma con V-ing |
mustn't I concentrate? mustn't you concentrate? mustn't he concentrate? mustn't we concentrate? mustn't you concentrate? mustn't they concentrate? | mustn't I be concentrating? mustn't you be concentrating? mustn't he be concentrating? mustn't we be concentrating? mustn't you be concentrating? mustn't they be concentrating? |
Perfecto | Perfecto con V-ing |
mustn't I have concentrated? mustn't you have concentrated? mustn't he have concentrated? mustn't we have concentrated? mustn't you have concentrated? mustn't they have concentrated? | mustn't I have been concentrating? mustn't you have been concentrating? mustn't he have been concentrating? mustn't we have been concentrating? mustn't you have been concentrating? mustn't they have been concentrating? |