$form = \Ameos\AmeosForm\Form\Factory::make('tx_myextension_myplugin', $mymodel);

$mymodel = GeneralUtility::makeInstance(\Vendor\Extension\Domain\Model\MyModel::class);

$mymodel = $this->myModelRepository->findByUid($modelIdentifier);

$searchform = \Ameos\AmeosForm\Form\Factory::make('tx_myextension_myplugin', $myrepository);

$searchform->addWhereClause([
	'type'    => 'logicalOr',
	'clauses' => [
		['field' => 'myfield', 'type'  => 'like', 'value' => 'myvalue1'],
		['field' => 'myfield', 'type'  => 'like', 'value' => 'myvalue2'],
		['field' => 'myfield', 'type'  => 'like', 'value' => 'myvalue3'],
	]
]);
$searchform->addWhereClause([
	'field' => 'myfield',
	'type'  => 'equals',
	'value' => 'myvalue'
]);

$template = ExtensionManagementUtility::extPath('ameos_intervention') . 'Resources/Private/Templates/Controller/ActionList.html';
$list = $this->objectManager->create(\Ameos\AmeosForm\Library\RecordList::class, $searchform, $template, $this->controllerContext, 'field_to_order', 'order_direction (ASC | DESC)');

$this->view->assign('searchform', $searchform);
$this->view->assign('list', $list);

$form = \Ameos\AmeosForm\Form\Factory::make('tx_myextension_myplugin');

$mymodel = $this->myModelRepository->findByUid($modelIdentifier);

$form = \Ameos\AmeosForm\Form\Factory::make('tx_myplugin', $mymodel);
$form->add('name', 'text')->validator('name', 'required', 'Name is mandatory');
$form->add('email', 'email')->validator('email', 'email', 'Email is not valid');
$form->add('submit', 'submit', array('label' => 'Send'));

if($form->isSubmitted()) {
	$form->bindRequest($this->request);
	if($form->isValid()) {
		
		$this->myModelRepository->add($mymodel);
		
		$this->addFlashMessage('New record created');
		$this->redirect('index')
	}
}

$this->view->assign('form', $form);

$form->add($name, $type', $configuration);

$form->addConstraint($field, $type, $message, $configuration); //  $configuration is optional. Depends the type of validator

$form->disableCsrftoken();

$form->disableHoneypot();

$form->add('my-button', 'button', $configuration);

$form->add('my-captcha', 'captcha', $configuration);

$form->add('my-checkbox', 'checkbox', $configuration);

$form->add('istrue', 'checksingle', $configuration);

$form->add('my-color-field', 'color', $configuration);

$form->add('birthdate', 'date', $configuration);

$form->add('startdate', 'datepicker', $configuration);

$form->add('my-dropdown', 'dropdown', $configuration);

$form->add('my-email', 'email', $configuration);

$form->add('my-hidden-field', 'hidden', $configuration);

$form->add('my-number-field', 'number', $configuration);

$form->add('my-password', 'password', $configuration);

$form->add('my-radiobutton', 'radio', $configuration);

$form->add('my-range-field', 'range', $configuration);

$form->add('my-rating', 'rating', $configuration);

$form->add('my-recaptcha', 'recaptcha', $configuration);

$form->add('my-button', 'submit', $configuration);

$form->add('my-tel', 'tel', $configuration);

$form->add('my-text', 'text', $configuration);

$form->add('my-textarea', 'textarea', $configuration);

$form->add('my-file', 'update', $configuration);

$form->add('my-url', 'url', $configuration);

$form->add('my-custom', 'Vendor\\Extension\\FormElements\\MyElement', $configuration)

Ameos\AmeosForm\Elements\ElementInterface

$form->addConstraint('my_field', 'required', 'My field is required');

$form->addConstraint('my_field', 'email', 'My field must be an email');

$form->addConstraint('my_field_confirmation', 'sameas', 'Confirmation is not valid', array('sameas' => 'my_field'));

$form->addConstraint('username', 'unique', 'Username must be unique', array('repository' => $this->frontenduserRepository));

$form->addConstraint('username', 'custom', 'Custom validation not valid', array('method' => function($value, $form) {
	// your code here. return true if result is valid. Else, false
}));

$form->addConstraint('file', 'filesize', 'File too big', array('maxsize' => '2M')); 

$form->addConstraint('file', 'fileextention', 'Your file must be a picture', array('allowed' => 'jpg,gif,png'));

$mymodel = $this->myModelRepository->findByUid($modelIdentifier);
$form = \Ameos\AmeosForm\Form\Factory::make('tx_myplugin', $mymodel);
$form->add('name', 'text')->addConstraint('name', 'required', 'Name is mandatory');
$form->add('email', 'email')->addConstraint('email', 'email', 'Email is not valid');
$form->add('submit', 'submit', array('label' => 'Send'));
$this->view->assign('form', $form);

{namespace form=Ameos\AmeosForm\ViewHelpers}
<form:form form="{form}">
	<f:if condition="{errors}">
		<div class="errors">
			<f:for each="{errors}" as="error">
				<span class="error">{error}</span>
			</f:for>			
		</div>
	</f:if>
	<div class="form">
		<p><label for="tx_myplugin_name"><f:translate key="name" /></label>{name}</p>
		<p><label for="tx_myplugin_email"><f:translate key="email" /></label>{email}</p>
		<p><form:element element="{submit}" class="button" />
	</div>
</form:form>

$searchform = \Ameos\AmeosForm\Form\Factory::make('tx_myplugin', $this->myModelRepository);
$searchform->add('name', 'text');
$searchform->add('email', 'email');
$searchform->add('submit', 'submit', array('label' => 'Search'));

$template = ExtensionManagementUtility::extPath('my_ext') . 'Resources/Private/Templates/Controller/List.html';
$list = $this->objectManager->create(\Ameos\AmeosForm\Library\RecordList::class, $searchform, $template, $this->controllerContext);

$this->view->assign('my-searchform', $searchform);
$this->view->assign('my-list', $list);

{namespace form=Ameos\AmeosForm\ViewHelpers}
<form:form form="{my-searchform}">
	<div class="form">
		<p><label for="tx_myplugin_name"><f:translate key="name" /></label>{name}</p>
		<p><label for="tx_myplugin_email"><f:translate key="email" /></label>{email}</p>
		<p><form:element element="{submit}" class="button" />
	</div>
</form:form>
<form:list list="{my-list}" />

$form->validator('my_field', 'required', 'My field is required');

$form->validator('my_field', 'email', 'My field must be an email');

$form->validator('my_field_confirmation', 'sameas', 'Confirmation is not valid', array('sameas' => 'my_field'));

$form->validator('username', 'unique', 'Username must be unique', array('repository' => $this->frontenduserRepository));

$form->validator('username', 'custom', 'Custom validation not valid', array('method' => function($value, $form) {
	// your code here. return true if result is valid. Else, false
}));

$form->validator('file', 'filesize', 'File too big', array('maxsize' => '2M')); 

$form->validator('file', 'fileextention', 'Your file must be a picture', array('allowed' => 'jpg,gif,png'));