<form class="form--inset" action="" method="">
  <div class="form__img">
    <img src="https://via.placeholder.com/150" alt="placeholder image" />
  </div>
  <div class="">
    <label for="username">Username:</label>
    <input class="form__input--offset" type="text" placeholder="Enter your name" name="username" required />

    <label for="useremail">Email:</label>
    <input class="form__input" type="email" placeholder="Enter your email" name="useremail" required />

    <label for="password">Password:</label>
    <input class="form__input--offset" type="password" placeholder="Enter password" name="password" required />

    <div class="flex">
      <div class="form__terms">
        <input type="checkbox" checked="checked" />
        <label>Terms & conditions</label>
      </div>
      <button class="form__submit--inset" type="submit">Register</button>
    </div>
  </div>
</form>