Webtags

<form>
  <div class="form-group">
    <label for="inputEmailOne">Email address</label>
    <input type="email" class="form-control" id="innputEmailOne" aria-describedby="emailHelp" placeholder="Enter email">
    <small id="emailHelp" class="form-text text-muted">You email will be secure here.</small>
  </div>
  <div class="form-group">
    <label for="inputPasswordOne">Password</label>
    <input type="password" class="form-control" id="inputPasswordOne" placeholder="Password">
  </div>
  <div class="form-group form-check">
    <input type="checkbox" class="form-check-input" id="exampleCheckOne">
    <label class="form-check-label" for="exampleCheckOne">Check me out</label>
  </div>
  <button type="submit" class="btn btn-primary">Submit</button>
</form>

<input class="form-control form-control-sm" type="text" placeholder=".form-control-sm">
<input class="form-control" type="text" placeholder="Default input">
<input class="form-control form-control-lg" type="text" placeholder=".form-control-lg"> 

<select class="form-control form-control-lg">
  <option>Large select1</option>
  <option>Large select2</option>
  <option>Large select3</option>
</select>
<select class="form-control">
  <option>Default select1</option>
  <option>Default select2</option>
  <option>Default select2</option>
</select>
<select class="form-control form-control-sm">
  <option>Small select1</option>
  <option>Small select2</option>
  <option>Small select3</option>
</select>

<form class="form-inline">
  <div class="form-group">
    <label for="email">Email address:</label>
    <input type="email" class="form-control" id="email">
  </div>
  <div class="form-group">
    <label for="pwd">Password:</label>
    <input type="password" class="form-control" id="pwd">
  </div>
  <div class="checkbox">
    <label><input type="checkbox"> Remember me</label>
  </div>
  <button type="submit" class="btn btn-primary">Submit</button>
</form>

<form>
  <div class="form-group">
    <label for="exampleFormControlFileOne">Example file input</label>
    <input type="file" class="form-control-file" id="exampleFormControlFileOne">
  </div>
</form>