English verb conjugation
MAY SUSTAIN

Regular verb: sustain - sustained - sustained

Affirmation

Simple form	V-ing form
I may sustain you may sustain he may sustain we may sustain you may sustain they may sustain	I may be sustaining you may be sustaining he may be sustaining we may be sustaining you may be sustaining they may be sustaining
Perfect	V-ing perfect
I may have sustained you may have sustained he may have sustained we may have sustained you may have sustained they may have sustained	I may have been sustaining you may have been sustaining he may have been sustaining we may have been sustaining you may have been sustaining they may have been sustaining

Negation

Simple form	V-ing form
I may not sustain you may not sustain he may not sustain we may not sustain you may not sustain they may not sustain	I may not be sustaining you may not be sustaining he may not be sustaining we may not be sustaining you may not be sustaining they may not be sustaining
Perfect	V-ing perfect
I may not have sustained you may not have sustained he may not have sustained we may not have sustained you may not have sustained they may not have sustained	I may not have been sustaining you may not have been sustaining he may not have been sustaining we may not have been sustaining you may not have been sustaining they may not have been sustaining

Interrogative form

Simple form	V-ing form
may I sustain? may you sustain? may he sustain? may we sustain? may you sustain? may they sustain?	may I be sustaining? may you be sustaining? may he be sustaining? may we be sustaining? may you be sustaining? may they be sustaining?
Perfect	V-ing perfect
may I have sustained? may you have sustained? may he have sustained? may we have sustained? may you have sustained? may they have sustained?	may I have been sustaining? may you have been sustaining? may he have been sustaining? may we have been sustaining? may you have been sustaining? may they have been sustaining?

Interro-negative form

Simple form	V-ing form
may I not sustain? may you not sustain? may he not sustain? may we not sustain? may you not sustain? may they not sustain?	may I not be sustaining? may you not be sustaining? may he not be sustaining? may we not be sustaining? may you not be sustaining? may they not be sustaining?
Perfect	V-ing perfect
may I not have sustained? may you not have sustained? may he not have sustained? may we not have sustained? may you not have sustained? may they not have sustained?	may I not have been sustaining? may you not have been sustaining? may he not have been sustaining? may we not have been sustaining? may you not have been sustaining? may they not have been sustaining?