English verb conjugation
MUST STRATIFY

Regular verb: stratify - stratified - stratified

Affirmation

Simple form	V-ing form
I must stratify you must stratify she must stratify we must stratify you must stratify they must stratify	I must be stratifying you must be stratifying she must be stratifying we must be stratifying you must be stratifying they must be stratifying
Perfect	V-ing perfect
I must have stratified you must have stratified she must have stratified we must have stratified you must have stratified they must have stratified	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

Negation

Simple form	V-ing form
I mustn't stratify you mustn't stratify she mustn't stratify we mustn't stratify you mustn't stratify they mustn't stratify	I mustn't be stratifying you mustn't be stratifying she mustn't be stratifying we mustn't be stratifying you mustn't be stratifying they mustn't be stratifying
Perfect	V-ing perfect
I mustn't have stratified you mustn't have stratified she mustn't have stratified we mustn't have stratified you mustn't have stratified they mustn't have stratified	I mustn't have been stratifying you mustn't have been stratifying she mustn't have been stratifying we mustn't have been stratifying you mustn't have been stratifying they mustn't have been stratifying

Interrogative form

Simple form	V-ing form
must I stratify? must you stratify? must she stratify? must we stratify? must you stratify? must they stratify?	must I be stratifying? must you be stratifying? must she be stratifying? must we be stratifying? must you be stratifying? must they be stratifying?
Perfect	V-ing perfect
must I have stratified? must you have stratified? must she have stratified? must we have stratified? must you have stratified? must they have stratified?	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?

Interro-negative form

Simple form	V-ing form
mustn't I stratify? mustn't you stratify? mustn't she stratify? mustn't we stratify? mustn't you stratify? mustn't they stratify?	mustn't I be stratifying? mustn't you be stratifying? mustn't she be stratifying? mustn't we be stratifying? mustn't you be stratifying? mustn't they be stratifying?
Perfect	V-ing perfect
mustn't I have stratified? mustn't you have stratified? mustn't she have stratified? mustn't we have stratified? mustn't you have stratified? mustn't they have stratified?	mustn't I have been stratifying? mustn't you have been stratifying? mustn't she have been stratifying? mustn't we have been stratifying? mustn't you have been stratifying? mustn't they have been stratifying?