I can not （choose） but laugh
I can not help laughing
I can not keep from laughter
I can not keep my gravity
I can not keep my countenance.
Laugh at me as you will, I will not give up my belief
You can not laugh me out of my belief.
to make a fool oneself―make an ass of oneself―make a show of oneself―make an exhibition of oneself
You will only get laughed at for your pains―You will be a fool for your pains―（他動詞構文にすれば）―Your conduct will expose you to ridicule.
Do not make yourself ridiculous by doing such a thing
Do not make an ass of yourself!
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I will laugh. - Weblio Email例文集
He smiles. - Weblio Email例文集
He laughs. - Weblio Email例文集