English verb conjugation
CAN BOIL

Regular verb: boil - boiled - boiled

Affirmation

Simple form	V-ing form
I can boil you can boil he can boil we can boil you can boil they can boil	I can be boiling you can be boiling he can be boiling we can be boiling you can be boiling they can be boiling
Perfect	V-ing perfect
I can have boiled you can have boiled he can have boiled we can have boiled you can have boiled they can have boiled	I can have been boiling you can have been boiling he can have been boiling we can have been boiling you can have been boiling they can have been boiling

Negation

Simple form	V-ing form
I can't boil you can't boil he can't boil we can't boil you can't boil they can't boil	I can't be boiling you can't be boiling he can't be boiling we can't be boiling you can't be boiling they can't be boiling
Perfect	V-ing perfect
I can't have boiled you can't have boiled he can't have boiled we can't have boiled you can't have boiled they can't have boiled	I can't have been boiling you can't have been boiling he can't have been boiling we can't have been boiling you can't have been boiling they can't have been boiling

Interrogative form

Simple form	V-ing form
can I boil? can you boil? can he boil? can we boil? can you boil? can they boil?	can I be boiling? can you be boiling? can he be boiling? can we be boiling? can you be boiling? can they be boiling?
Perfect	V-ing perfect
can I have boiled? can you have boiled? can he have boiled? can we have boiled? can you have boiled? can they have boiled?	can I have been boiling? can you have been boiling? can he have been boiling? can we have been boiling? can you have been boiling? can they have been boiling?

Interro-negative form

Simple form	V-ing form
can't I boil? can't you boil? can't he boil? can't we boil? can't you boil? can't they boil?	can't I be boiling? can't you be boiling? can't he be boiling? can't we be boiling? can't you be boiling? can't they be boiling?
Perfect	V-ing perfect
can't I have boiled? can't you have boiled? can't he have boiled? can't we have boiled? can't you have boiled? can't they have boiled?	can't I have been boiling? can't you have been boiling? can't he have been boiling? can't we have been boiling? can't you have been boiling? can't they have been boiling?