Conjugaison du verbe anglais CAN BACK

I can back
you can back
she can back
we can back
you can back
they can back

I can be backing
you can be backing
she can be backing
we can be backing
you can be backing
they can be backing

I can have backed
you can have backed
she can have backed
we can have backed
you can have backed
they can have backed

I can have been backing
you can have been backing
she can have been backing
we can have been backing
you can have been backing
they can have been backing

I can't back
you can't back
she can't back
we can't back
you can't back
they can't back

I can't be backing
you can't be backing
she can't be backing
we can't be backing
you can't be backing
they can't be backing

I can't have backed
you can't have backed
she can't have backed
we can't have backed
you can't have backed
they can't have backed

I can't have been backing
you can't have been backing
she can't have been backing
we can't have been backing
you can't have been backing
they can't have been backing

can I back?
can you back?
can she back?
can we back?
can you back?
can they back?

can I be backing?
can you be backing?
can she be backing?
can we be backing?
can you be backing?
can they be backing?

can I have backed?
can you have backed?
can she have backed?
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can they have backed?

can I have been backing?
can you have been backing?
can she have been backing?
can we have been backing?
can you have been backing?
can they have been backing?

can't I back?
can't you back?
can't she back?
can't we back?
can't you back?
can't they back?

can't I be backing?
can't you be backing?
can't she be backing?
can't we be backing?
can't you be backing?
can't they be backing?

can't I have backed?
can't you have backed?
can't she have backed?
can't we have backed?
can't you have backed?
can't they have backed?

can't I have been backing?
can't you have been backing?
can't she have been backing?
can't we have been backing?
can't you have been backing?
can't they have been backing?