add adsense-inarticle.html in your partials.

vim /your/hugo/theme/yourtheme/layout/partial/adsense-inarticle.html

add these:

<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- postPage -->
<ins class="adsbygoogle"
     style="display:inline-block;width:728px;height:90px"
     data-ad-client="{{.Site.Params.Adsclient}}"
     data-ad-slot="{{.Site.Params.AdsinArticleSlot}}"></ins>
<script>
     (adsbygoogle = window.adsbygoogle || []).push({});
</script>

then go to your config.tomi add Adsclient & AdsinArticleSlot in params

Adsclient = "ca-pub-0000000000"
AdsinArticleSlot = "00000000"

finally, add these code after .Content in single.html:

{{ partial "adsense-inarticle.html" . }}

look like this:

<article>{{ .Content | emojify }}{{ partial "adsense-inarticle.html" . }}`</article>