Verbo regular: sift - sifted - sifted
Forma simple | Forma con V-ing |
I must sift you must sift she must sift we must sift you must sift they must sift | I must be sifting you must be sifting she must be sifting we must be sifting you must be sifting they must be sifting |
Perfecto | Perfecto con V-ing |
I must have sifted you must have sifted she must have sifted we must have sifted you must have sifted they must have sifted | I must have been sifting you must have been sifting she must have been sifting we must have been sifting you must have been sifting they must have been sifting |
Forma simple | Forma con V-ing |
I mustn't sift you mustn't sift she mustn't sift we mustn't sift you mustn't sift they mustn't sift | I mustn't be sifting you mustn't be sifting she mustn't be sifting we mustn't be sifting you mustn't be sifting they mustn't be sifting |
Perfecto | Perfecto con V-ing |
I mustn't have sifted you mustn't have sifted she mustn't have sifted we mustn't have sifted you mustn't have sifted they mustn't have sifted | I mustn't have been sifting you mustn't have been sifting she mustn't have been sifting we mustn't have been sifting you mustn't have been sifting they mustn't have been sifting |
Forma simple | Forma con V-ing |
must I sift? must you sift? must she sift? must we sift? must you sift? must they sift? | must I be sifting? must you be sifting? must she be sifting? must we be sifting? must you be sifting? must they be sifting? |
Perfecto | Perfecto con V-ing |
must I have sifted? must you have sifted? must she have sifted? must we have sifted? must you have sifted? must they have sifted? | must I have been sifting? must you have been sifting? must she have been sifting? must we have been sifting? must you have been sifting? must they have been sifting? |
Forma simple | Forma con V-ing |
mustn't I sift? mustn't you sift? mustn't she sift? mustn't we sift? mustn't you sift? mustn't they sift? | mustn't I be sifting? mustn't you be sifting? mustn't she be sifting? mustn't we be sifting? mustn't you be sifting? mustn't they be sifting? |
Perfecto | Perfecto con V-ing |
mustn't I have sifted? mustn't you have sifted? mustn't she have sifted? mustn't we have sifted? mustn't you have sifted? mustn't they have sifted? | mustn't I have been sifting? mustn't you have been sifting? mustn't she have been sifting? mustn't we have been sifting? mustn't you have been sifting? mustn't they have been sifting? |