English verb conjugation
CAN CLEAN

Regular verb: clean - cleaned - cleaned

Affirmation

Simple form	V-ing form
I can clean you can clean he can clean we can clean you can clean they can clean	I can be cleaning you can be cleaning he can be cleaning we can be cleaning you can be cleaning they can be cleaning
Perfect	V-ing perfect
I can have cleaned you can have cleaned he can have cleaned we can have cleaned you can have cleaned they can have cleaned	I can have been cleaning you can have been cleaning he can have been cleaning we can have been cleaning you can have been cleaning they can have been cleaning

Negation

Simple form	V-ing form
I cannot clean you cannot clean he cannot clean we cannot clean you cannot clean they cannot clean	I cannot be cleaning you cannot be cleaning he cannot be cleaning we cannot be cleaning you cannot be cleaning they cannot be cleaning
Perfect	V-ing perfect
I cannot have cleaned you cannot have cleaned he cannot have cleaned we cannot have cleaned you cannot have cleaned they cannot have cleaned	I cannot have been cleaning you cannot have been cleaning he cannot have been cleaning we cannot have been cleaning you cannot have been cleaning they cannot have been cleaning

Interrogative form

Simple form	V-ing form
can I clean? can you clean? can he clean? can we clean? can you clean? can they clean?	can I be cleaning? can you be cleaning? can he be cleaning? can we be cleaning? can you be cleaning? can they be cleaning?
Perfect	V-ing perfect
can I have cleaned? can you have cleaned? can he have cleaned? can we have cleaned? can you have cleaned? can they have cleaned?	can I have been cleaning? can you have been cleaning? can he have been cleaning? can we have been cleaning? can you have been cleaning? can they have been cleaning?

Interro-negative form

Simple form	V-ing form
can I not clean? can you not clean? can he not clean? can we not clean? can you not clean? can they not clean?	can I not be cleaning? can you not be cleaning? can he not be cleaning? can we not be cleaning? can you not be cleaning? can they not be cleaning?
Perfect	V-ing perfect
can I not have cleaned? can you not have cleaned? can he not have cleaned? can we not have cleaned? can you not have cleaned? can they not have cleaned?	can I not have been cleaning? can you not have been cleaning? can he not have been cleaning? can we not have been cleaning? can you not have been cleaning? can they not have been cleaning?