<div style="padding: 100px 100px 10px;">
<form class="bs-example bs-example-form" role="form">
<div class="input-group input-group-lg">
<span class="input-group-addon">@</span>
<input type="text" class="form-control" placeholder="twitterhandle">
</div>
<br>
<div class="input-group">
<input type="text" class="form-control">
<span class="input-group-addon">.00</span>
</div>
<br>
<div class="input-group">
<span class="input-group-addon">$</span>
<input type="text" class="form-control">
<span class="input-group-addon">.00</span>
</div>
</form>
</div>

<div style="padding: 100px 100px 10px;">
<form class="bs-example bs-example-form" role="form">
<div class="row">
<div class="col-lg-6">
<div class="input-group">
<span class="input-group-addon">
<input type="checkbox">
</span>
<input type="text" class="form-control">
</div><!-- /input-group -->
</div><!-- /.col-lg-6 --><br>
<div class="col-lg-6">
<div class="input-group">
<span class="input-group-addon">
<input type="radio">
</span>
<input type="text" class="form-control">
</div><!-- /input-group -->
</div><!-- /.col-lg-6 -->
</div><!-- /.row -->
</form>
</div>

<div style="padding: 100px 100px 10px;">
<form class="bs-example bs-example-form" role="form">
<div class="row">
<div class="col-lg-6">
<div class="input-group">
<span class="input-group-btn">
<button class="btn btn-default" type="button">
Go!
</button>
</span>
<input type="text" class="form-control">
</div><!-- /input-group -->
</div><!-- /.col-lg-6 --><br>
<div class="col-lg-6">
<div class="input-group">
<input type="text" class="form-control">
<span class="input-group-btn">
<button class="btn btn-default" type="button">
Go!
</button>
</span>
</div><!-- /input-group -->
</div><!-- /.col-lg-6 -->
</div><!-- /.row -->
</form>
</div>
class="input-group-btn"
<div class="input-group">
<div class="input-group-btn">
<button type="button" class="btn btn-default 
dropdown-toggle" data-toggle="dropdown">
下拉菜单 
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="#">功能</a></li>
<li><a href="#">另一个功能</a></li>
<li><a href="#">其他</a></li>
<li class="divider"></li>
<li><a href="#">分离的链接</a></li>
</ul>
</div><!-- /btn-group -->
<input type="text" class="form-control">
</div><!-- /input-group -->
<div class="input-group">
<div class="input-group-btn">
<button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">
<span class="glyphicon glyphicon-music"></span> GO
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li class="dropdown-header">下拉菜单标题</li>
<li><a href="#">A</a></li>
<li class="divider"><</li>
<li><a href="#">B</a></li>
</ul> 
</div>
<input type="text" class="form-control"> 
</div>
<br>
<div class="input-group">
<div class="input-group-btn">
<button type="button" class="btn btn-primary">
<span class="glyphicon glyphicon-music"></span> GO
</button> 
<button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li class="dropdown-header">下拉菜单标题</li>
<li><a href="#">A</a></li>
<li class="divider"><</li>
<li><a href="#">B</a></li>
</ul> 
</div>
<input type="text" class="form-control"> 
</div>
<br>