How do I say an action was performed "by" someone?

For example:

> I was rejected _by_ him.
>
> I was laughed at _by_ him

Sorry if I'm not making sense.. basically when someone else does something to
another person.
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2016-02-17T13:50:49.670
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question
grammar passive-voice
How to say "by ___"
"に" coupled with the [passive
form](http://www.guidetojapanese.org/learn/grammar/causepass) of a verb will
do the trick.

> I was rejected by him
>
> 彼に断られた
>
> I was laughed at by him
>
> 彼に笑われた

In the above examples, the English "by" would correspond to the "に".

* * *

The passive form can also be combined with the causative form, to form a
causative-passive form.

> He made me laugh
>
> 彼に笑わせられた
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answer