Bootstrap's form

 (1) Default form

      <form>

       <div class="form-group">

         <label class="control-label" for=""></label>

         <input class="form-control">

         <span class="help-block"></span>

       </div>

      </form>

    (2) Inline form

      <form class="form-inline">

       <div class="form-group">

         <label class="sr-only"></label>

         <input class="form-control">

       </div>

      </form>

(3) Horizontal form

     horizontal form = form + grid system (variant)

 <form class=" form-horizontal ">

       <div class="form-group">

         <div class="col-*-*">

           <label class="sr-only"></label>

         </div>

         <div class="col-*-*">

           <input class="form-control">

         </div>

      </div>

    </form>