English verb conjugation COULD LOCK

Regular verb: lock - locked - locked

Affirmation

Simple form

I could lock
you could lock
he could lock
we could lock
you could lock
they could lock

V-ing form

I could be locking
you could be locking
he could be locking
we could be locking
you could be locking
they could be locking

Perfect

I could have locked
you could have locked
he could have locked
we could have locked
you could have locked
they could have locked

V-ing perfect

I could have been locking
you could have been locking
he could have been locking
we could have been locking
you could have been locking
they could have been locking

Negation

Simple form

I couldn't lock
you couldn't lock
he couldn't lock
we couldn't lock
you couldn't lock
they couldn't lock

V-ing form

I couldn't be locking
you couldn't be locking
he couldn't be locking
we couldn't be locking
you couldn't be locking
they couldn't be locking

Perfect

I couldn't have locked
you couldn't have locked
he couldn't have locked
we couldn't have locked
you couldn't have locked
they couldn't have locked

V-ing perfect

I couldn't have been locking
you couldn't have been locking
he couldn't have been locking
we couldn't have been locking
you couldn't have been locking
they couldn't have been locking

Interrogative form

Simple form

could I lock?
could you lock?
could he lock?
could we lock?
could you lock?
could they lock?

V-ing form

could I be locking?
could you be locking?
could he be locking?
could we be locking?
could you be locking?
could they be locking?

Perfect

could I have locked?
could you have locked?
could he have locked?
could we have locked?
could you have locked?
could they have locked?

V-ing perfect

could I have been locking?
could you have been locking?
could he have been locking?
could we have been locking?
could you have been locking?
could they have been locking?

Interro-negative form

Simple form

couldn't I lock?
couldn't you lock?
couldn't he lock?
couldn't we lock?
couldn't you lock?
couldn't they lock?

V-ing form

couldn't I be locking?
couldn't you be locking?
couldn't he be locking?
couldn't we be locking?
couldn't you be locking?
couldn't they be locking?

Perfect

couldn't I have locked?
couldn't you have locked?
couldn't he have locked?
couldn't we have locked?
couldn't you have locked?
couldn't they have locked?

V-ing perfect

couldn't I have been locking?
couldn't you have been locking?
couldn't he have been locking?
couldn't we have been locking?
couldn't you have been locking?
couldn't they have been locking?

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