English verb conjugation
MAY PREBOIL

Regular verb: preboil - preboiled - preboiled

Affirmation

Simple form	V-ing form
I may preboil you may preboil he may preboil we may preboil you may preboil they may preboil	I may be preboiling you may be preboiling he may be preboiling we may be preboiling you may be preboiling they may be preboiling
Perfect	V-ing perfect
I may have preboiled you may have preboiled he may have preboiled we may have preboiled you may have preboiled they may have preboiled	I may have been preboiling you may have been preboiling he may have been preboiling we may have been preboiling you may have been preboiling they may have been preboiling

Negation

Simple form	V-ing form
I mayn't preboil you mayn't preboil he mayn't preboil we mayn't preboil you mayn't preboil they mayn't preboil	I mayn't be preboiling you mayn't be preboiling he mayn't be preboiling we mayn't be preboiling you mayn't be preboiling they mayn't be preboiling
Perfect	V-ing perfect
I mayn't have preboiled you mayn't have preboiled he mayn't have preboiled we mayn't have preboiled you mayn't have preboiled they mayn't have preboiled	I mayn't have been preboiling you mayn't have been preboiling he mayn't have been preboiling we mayn't have been preboiling you mayn't have been preboiling they mayn't have been preboiling

Interrogative form

Simple form	V-ing form
may I preboil? may you preboil? may he preboil? may we preboil? may you preboil? may they preboil?	may I be preboiling? may you be preboiling? may he be preboiling? may we be preboiling? may you be preboiling? may they be preboiling?
Perfect	V-ing perfect
may I have preboiled? may you have preboiled? may he have preboiled? may we have preboiled? may you have preboiled? may they have preboiled?	may I have been preboiling? may you have been preboiling? may he have been preboiling? may we have been preboiling? may you have been preboiling? may they have been preboiling?

Interro-negative form

Simple form	V-ing form
mayn't I preboil? mayn't you preboil? mayn't he preboil? mayn't we preboil? mayn't you preboil? mayn't they preboil?	mayn't I be preboiling? mayn't you be preboiling? mayn't he be preboiling? mayn't we be preboiling? mayn't you be preboiling? mayn't they be preboiling?
Perfect	V-ing perfect
mayn't I have preboiled? mayn't you have preboiled? mayn't he have preboiled? mayn't we have preboiled? mayn't you have preboiled? mayn't they have preboiled?	mayn't I have been preboiling? mayn't you have been preboiling? mayn't he have been preboiling? mayn't we have been preboiling? mayn't you have been preboiling? mayn't they have been preboiling?