I must stratify you must stratify she must stratify we must stratify you must stratify they must stratify
Forma con V-ing
I must be stratifying you must be stratifying she must be stratifying we must be stratifying you must be stratifying they must be stratifying
Perfecto
I must have stratified you must have stratified she must have stratified we must have stratified you must have stratified they must have stratified
Perfecto con V-ing
I must have been stratifying you must have been stratifying she must have been stratifying we must have been stratifying you must have been stratifying they must have been stratifying
Negación
Forma simple
I must not stratify you must not stratify she must not stratify we must not stratify you must not stratify they must not stratify
Forma con V-ing
I must not be stratifying you must not be stratifying she must not be stratifying we must not be stratifying you must not be stratifying they must not be stratifying
Perfecto
I must not have stratified you must not have stratified she must not have stratified we must not have stratified you must not have stratified they must not have stratified
Perfecto con V-ing
I must not have been stratifying you must not have been stratifying she must not have been stratifying we must not have been stratifying you must not have been stratifying they must not have been stratifying
Forma interrogativa
Forma simple
must I stratify? must you stratify? must she stratify? must we stratify? must you stratify? must they stratify?
Forma con V-ing
must I be stratifying? must you be stratifying? must she be stratifying? must we be stratifying? must you be stratifying? must they be stratifying?
Perfecto
must I have stratified? must you have stratified? must she have stratified? must we have stratified? must you have stratified? must they have stratified?
Perfecto con V-ing
must I have been stratifying? must you have been stratifying? must she have been stratifying? must we have been stratifying? must you have been stratifying? must they have been stratifying?
Forma interro-negativa
Forma simple
must I not stratify? must you not stratify? must she not stratify? must we not stratify? must you not stratify? must they not stratify?
Forma con V-ing
must I not be stratifying? must you not be stratifying? must she not be stratifying? must we not be stratifying? must you not be stratifying? must they not be stratifying?
Perfecto
must I not have stratified? must you not have stratified? must she not have stratified? must we not have stratified? must you not have stratified? must they not have stratified?
Perfecto con V-ing
must I not have been stratifying? must you not have been stratifying? must she not have been stratifying? must we not have been stratifying? must you not have been stratifying? must they not have been stratifying?