html - 如何使用引导程序使标签与输入对齐？

在这里，您有与所寻找的相似的东西：

<form>
  <div class="form-row justify-content-between">
    <div class="form-group row col-md-4">
      <label class="col-sm-4 col-form-label">Rif: </label>
      <div class="col-sm-8">
        <input type="text" name="rif" id="rif" class="form-control" />
      </div>
    </div>

    <div class="form-group row col-md-8">
      <label class="col-sm-2 col-form-label">Empresa: </label>
      <div class="col-sm-10">
        <input type="text" name="razon_social" id="razon_social" class="form-control" />
      </div>
    </div>
  </div>

  <div class="form-row justify-content-between">
    <div class="form-group row col-md-4">
      <label class="col-sm-4 col-form-label">Rif.Holding: </label>
      <div class="col-sm-8">
        <select name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">
          <option value="1" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">Rif 1</option>
          <option value="2" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">Rif 2</option>
          <option value="3" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">Rif 3</option>
          <option value="4" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">Rif 4</option>
          <option value="5" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">Rif 5</option>
        </select>
      </div>
    </div>

    <div class="form-group row col-md-8">
      <label class="col-sm-2 col-form-label">Nom.Holding: </label>
      <div class="col-sm-10">
        <select name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">
          <option value="1" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">NomHolding 1</option>
          <option value="2" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">NomHolding 2</option>
          <option value="3" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">NomHolding 3</option>
          <option value="4" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">NomHolding 4</option>
          <option value="5" name="fk_empresaholding_id" id="fk_empresaholding_id" class="form-control">NomHolding 5</option>
        </select>
      </div>
    </div>
  </div>

  <div class="form-row justify-content-between">
    <div class="form-group row col-md-4">
      <label class="col-sm-4 col-form-label">PIN: </label>
      <div class="col-sm-8">
        <select name="fk_pin_id" id="fk_pin_id" class="form-control">
          <option value="1" name="fk_pin_id" id="fk_pin_id" class="form-control">Pin 1</option>
          <option value="2" name="fk_pin_id" id="fk_pin_id" class="form-control">Pin 2</option>
          <option value="3" name="fk_pin_id" id="fk_pin_id" class="form-control">Pin 3</option>
          <option value="4" name="fk_pin_id" id="fk_pin_id" class="form-control">Pin 4</option>
          <option value="5" name="fk_pin_id" id="fk_pin_id" class="form-control">Pin 5</option>
        </select>
      </div>
    </div>

    <div class="form-group row col-md-4">
      <label class="col-sm-4 col-form-label">Cartera: </label>
      <div class="col-sm-8">
        <select name="fk_cartera_id" id="fk_cartera_id" class="form-control">
          <option value="1" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 1</option>
          <option value="2" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 2</option>
          <option value="3" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 3</option>
          <option value="4" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 4</option>
          <option value="5" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 5</option>
        </select>
      </div>
    </div>

    <div class="form-group row col-md-4">
      <label class="col-sm-4 col-form-label">Cartera: </label>
      <div class="col-sm-8">
        <select name="fk_cartera_id" id="fk_cartera_id" class="form-control">
          <option value="1" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 1</option>
          <option value="2" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 2</option>
          <option value="3" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 3</option>
          <option value="4" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 4</option>
          <option value="5" name="fk_cartera_id" id="fk_cartera_id" class="form-control">Cartera 5</option>
        </select>
      </div>
    </div>
  </div>
</form>