English verb conjugation
CAN PREBOIL

Regular verb: preboil - preboiled - preboiled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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