English verb conjugation CAN CONCENTRATE

Regular verb: concentrate - concentrated - concentrated

Affirmation

Simple form

I can concentrate
you can concentrate
he can concentrate
we can concentrate
you can concentrate
they can concentrate

V-ing form

I can be concentrating
you can be concentrating
he can be concentrating
we can be concentrating
you can be concentrating
they can be concentrating

Perfect

I can have concentrated
you can have concentrated
he can have concentrated
we can have concentrated
you can have concentrated
they can have concentrated

V-ing perfect

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

Negation

Simple form

I cannot concentrate
you cannot concentrate
he cannot concentrate
we cannot concentrate
you cannot concentrate
they cannot concentrate

V-ing form

I cannot be concentrating
you cannot be concentrating
he cannot be concentrating
we cannot be concentrating
you cannot be concentrating
they cannot be concentrating

Perfect

I cannot have concentrated
you cannot have concentrated
he cannot have concentrated
we cannot have concentrated
you cannot have concentrated
they cannot have concentrated

V-ing perfect

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

Interrogative form

Simple form

can I concentrate?
can you concentrate?
can he concentrate?
can we concentrate?
can you concentrate?
can they concentrate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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