<form role="form">
<div class="form-group">
<label for="name">名称</label>
<input type="text" class="form-control" id="name"
placeholder="请输入名称">
</div>
<div class="form-group">
<label for="inputfile">文件输入</label>
<input type="file" id="inputfile">
<p class="help-block">这里是块级帮助文本的实例。</p>
</div>
<div class="checkbox">
<label>
<input type="checkbox"> 请打勾
</label>
</div>
<button type="submit" class="btn btn-default">提交</button>
</form>

<form class="form-inline" role="form">
<div class="form-group">
<label class="sr-only" for="name">名称</label>
<input type="text" class="form-control" id="name"
placeholder="请输入名称">
</div>
<div class="form-group">
<label class="sr-only" for="inputfile">文件输入</label>
<input type="file" id="inputfile">
</div>
<div class="checkbox">
<label>
<input type="checkbox"> 请打勾
</label>
</div>
<button type="submit" class="btn btn-default">提交</button>
</form>

<form class="form-horizontal" role="form">
<div class="form-group">
<label for="firstname" class="col-sm-2 control-label">名字</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="firstname"
placeholder="请输入名字">
</div>
</div>
<div class="form-group">
<label for="lastname" class="col-sm-2 control-label">姓</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="lastname"
placeholder="请输入姓">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<div class="checkbox">
<label>
<input type="checkbox"> 请记住我
</label>
</div>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-default">登录</button>
</div>
</div>
</form>