formulário Bootstrap 4
<form>
<div class="form-row align-items-center">
<div class="col-auto">
<label class="sr-only" for="inlineFormInput">Name</label>
<input type="text" class="form-control mb-2" id="inlineFormInput" placeholder="Jane Doe">
</div>
<div class="col-auto">
<label class="sr-only" for="inlineFormInputGroup">Username</label>
<div class="input-group mb-2">
<div class="input-group-prepend">
<div class="input-group-text">@</div>
</div>
<input type="text" class="form-control" id="inlineFormInputGroup" placeholder="Username">
</div>
</div>
<div class="col-auto">
<div class="form-check mb-2">
<input class="form-check-input" type="checkbox" id="autoSizingCheck">
<label class="form-check-label" for="autoSizingCheck">
Remember me
</label>
</div>
</div>
<div class="col-auto">
<button type="submit" class="btn btn-primary mb-2">Submit</button>
</div>
</div>
</form>
Eager Echidna