``` <form role="form"> <div class="form-group"> <label for="">用戶名</label> <input type="text" class="form-control"> </div> <div class="form-group"> <label for="">密碼</label> <input type="text" class="form-control"> </div> <div class="checkbox"> <label for=""> <input type="checkbox">記住密碼 </label> </div> <button type="submit" class="btn btn-default">提交</button> </form> ```