如何从Symfony2表单的div切换到表格布局？

{{ form_start(form) }}
    // 表单内容
{{ form_end(form) }}

{{ form_row(form.field1) }}
{{ form_row(form.field2) }}
{{ form_row(form.field3) }}

    <tr>
        <th>{{ form_label(form.field1) }}</th>
        <td>{{ form_widget(form.field1) }}</td>
    </tr>
    <tr>
        <th>{{ form_label(form.field2) }}</th>
        <td>{{ form_widget(form.field2) }}</td>
    </tr>
    <tr>
        <th>{{ form_label(form.field3) }}</th>
        <td>{{ form_widget(form.field3) }}</td>
    </tr>
</table>

    {{ form_rest(form) }}
</table>