English verb conjugation CAN LACK

Regular verb: lack - lacked - lacked


Affirmation

Simple form

I can lack
you can lack
he can lack
we can lack
you can lack
they can lack

V-ing form

I can be lacking
you can be lacking
he can be lacking
we can be lacking
you can be lacking
they can be lacking

Perfect

I can have lacked
you can have lacked
he can have lacked
we can have lacked
you can have lacked
they can have lacked

V-ing perfect

I can have been lacking
you can have been lacking
he can have been lacking
we can have been lacking
you can have been lacking
they can have been lacking

Negation

Simple form

I cannot lack
you cannot lack
he cannot lack
we cannot lack
you cannot lack
they cannot lack

V-ing form

I cannot be lacking
you cannot be lacking
he cannot be lacking
we cannot be lacking
you cannot be lacking
they cannot be lacking

Perfect

I cannot have lacked
you cannot have lacked
he cannot have lacked
we cannot have lacked
you cannot have lacked
they cannot have lacked

V-ing perfect

I cannot have been lacking
you cannot have been lacking
he cannot have been lacking
we cannot have been lacking
you cannot have been lacking
they cannot have been lacking

Interrogative form

Simple form

can I lack?
can you lack?
can he lack?
can we lack?
can you lack?
can they lack?

V-ing form

can I be lacking?
can you be lacking?
can he be lacking?
can we be lacking?
can you be lacking?
can they be lacking?

Perfect

can I have lacked?
can you have lacked?
can he have lacked?
can we have lacked?
can you have lacked?
can they have lacked?

V-ing perfect

can I have been lacking?
can you have been lacking?
can he have been lacking?
can we have been lacking?
can you have been lacking?
can they have been lacking?

Interro-negative form

Simple form

can I not lack?
can you not lack?
can he not lack?
can we not lack?
can you not lack?
can they not lack?

V-ing form

can I not be lacking?
can you not be lacking?
can he not be lacking?
can we not be lacking?
can you not be lacking?
can they not be lacking?

Perfect

can I not have lacked?
can you not have lacked?
can he not have lacked?
can we not have lacked?
can you not have lacked?
can they not have lacked?

V-ing perfect

can I not have been lacking?
can you not have been lacking?
can he not have been lacking?
can we not have been lacking?
can you not have been lacking?
can they not have been lacking?