<div class="row">

<div class="col-md-12">
<div class="mb-4">
[text your-name id:form-name akismet:author placeholder "Your Name"]
</div>
<div class="mb-4">
[email your-email id:form-email akismet:author_email placeholder "Email"]
</div>
<div class="mb-4">
[text your-subject id:form-subject akismet:author placeholder "Subject"]
</div>
<div class="mb-4">
[textarea your-message class:form-control id:textarea x3 placeholder "Message"]
</div>
</div>

</div>

[submit class:btn class:btn-default class:btn-sm "Submit"]