English verb conjugation
CAN DRAIN

Regular verb: drain - drained - drained

Affirmation

Simple form	V-ing form
I can drain you can drain he can drain we can drain you can drain they can drain	I can be draining you can be draining he can be draining we can be draining you can be draining they can be draining
Perfect	V-ing perfect
I can have drained you can have drained he can have drained we can have drained you can have drained they can have drained	I can have been draining you can have been draining he can have been draining we can have been draining you can have been draining they can have been draining

Negation

Simple form	V-ing form
I can't drain you can't drain he can't drain we can't drain you can't drain they can't drain	I can't be draining you can't be draining he can't be draining we can't be draining you can't be draining they can't be draining
Perfect	V-ing perfect
I can't have drained you can't have drained he can't have drained we can't have drained you can't have drained they can't have drained	I can't have been draining you can't have been draining he can't have been draining we can't have been draining you can't have been draining they can't have been draining

Interrogative form

Simple form	V-ing form
can I drain? can you drain? can he drain? can we drain? can you drain? can they drain?	can I be draining? can you be draining? can he be draining? can we be draining? can you be draining? can they be draining?
Perfect	V-ing perfect
can I have drained? can you have drained? can he have drained? can we have drained? can you have drained? can they have drained?	can I have been draining? can you have been draining? can he have been draining? can we have been draining? can you have been draining? can they have been draining?

Interro-negative form

Simple form	V-ing form
can't I drain? can't you drain? can't he drain? can't we drain? can't you drain? can't they drain?	can't I be draining? can't you be draining? can't he be draining? can't we be draining? can't you be draining? can't they be draining?
Perfect	V-ing perfect
can't I have drained? can't you have drained? can't he have drained? can't we have drained? can't you have drained? can't they have drained?	can't I have been draining? can't you have been draining? can't he have been draining? can't we have been draining? can't you have been draining? can't they have been draining?