I'm not a designer, but I need a form inline without using a table and responsivo like the image.
I've been trying for 2 days and nothing, <label>nome campo</label> always spoils the placement of the fields.
I'm trying to do something like the attached image. 
There is an example of how to do this in bootstrap documentation
<form class="form-inline">
<div class="form-group">
<label for="exampleInputName2">Name</label>
<input type="text" class="form-control" id="exampleInputName2" placeholder="Jane Doe">
</div>
<div class="form-group">
<label for="exampleInputEmail2">Email</label>
<input type="email" class="form-control" id="exampleInputEmail2" placeholder="[email protected]">
</div>
<button type="submit" class="btn btn-default">Send invitation</button>
</form>
With the bootstrap library you can do this:
<div class="row">
<div class="col-md-6">.col-md-6</div>
<div class="col-md-6">.col-md-6</div>
</div>
Simple form to send message to contact
<form method="post"">
<div class="row 50%">
<div class="6u"><input type="text" name="nome" placeholder="Nome" /></div>
<div class="6u"><input type="text" name="email" placeholder="Email" /></div>
</div>
<div class="row 50%">
<div class="12u"><input type="text" name="assunto" placeholder="Assunto" /></div>
</div>
<div class="row 50%">
<div class="12u">
<textarea name="mensagem" placeholder="Mensagem"></textarea>
</div>
</div>
<div class="row">
<div class="12u">
<h2 id="aguarde" style="display:none;" class="answer_list" >Aguarde...</h2>
<input type="submit" value="Enviar/>
</div>
</div>
</form>
I learned about bootstrapping with an example of cool websites with HTML5 CSS3 and Bootstrap. FIXING: link downloads a sample website and makes the party.