How to show up comment box

I forgot if add any code to my file so The whole site can not show up comment box, except About page

This is my Comments.php code, Can any one check for me?

<?php
/**
 * The template for displaying Comments.
 *
 * The area of the page that contains both current comments
 * and the comment form.
 *
 * @package Penscratch
 */

/*
 * If the current post is protected by a password and
 * the visitor has not yet entered the password we will
 * return early without loading the comments.
 */
if ( post_password_required() ) {
	return;
}
?>

<div id="comments" class="comments-area">

	<?php // You can start editing here -- including this comment! ?>

	<?php if ( have_comments() ) : ?>
		<h2 class="comments-title">
			<?php
				printf( _nx( 'One thought on “%2$s”', '%1$s thoughts on “%2$s”', get_comments_number(), 'comments title', 'penscratch' ),
					number_format_i18n( get_comments_number() ), '<span>' . get_the_title() . '</span>' );
			?>
		</h2>

		<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : // are there comments to navigate through ?>
		<nav id="comment-nav-above" class="comment-navigation" role="navigation">
			<h1 class="screen-reader-text"><?php _e( 'Comment navigation', 'penscratch' ); ?></h1>
			<div class="nav-previous"><?php previous_comments_link( __( '< Older Comments', 'penscratch' ) ); ?></div>
			<div class="nav-next"><?php next_comments_link( __( 'Newer Comments >', 'penscratch' ) ); ?></div>
		</nav><!-- #comment-nav-above -->
		<?php endif; // check for comment navigation ?>

		<ol class="comment-list">
			<?php
				wp_list_comments( array(
					'style'       => 'ol',
					'short_ping'  => true,
					'avatar_size' => 60
				) );
			?>
		<!-- .comment-list -->

		<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : // are there comments to navigate through ?>
		<nav id="comment-nav-below" class="comment-navigation" role="navigation">
			<h1 class="screen-reader-text"><?php _e( 'Comment navigation', 'penscratch' ); ?></h1>
			<div class="nav-previous"><?php previous_comments_link( __( '< Older Comments', 'penscratch' ) ); ?></div>
			<div class="nav-next"><?php next_comments_link( __( 'Newer Comments >', 'penscratch' ) ); ?></div>
		</nav><!-- #comment-nav-below -->
		<?php endif; // check for comment navigation ?>

	<?php endif; // have_comments() ?>

	<?php
		// If comments are closed and there are comments, let's leave a little note, shall we?
		if ( ! comments_open() && '0' != get_comments_number() && post_type_supports( get_post_type(), 'comments' ) ) :
	?>
		<p class="no-comments"><?php _e( 'Comments are closed.', 'penscratch' ); ?></p>
	<?php endif; ?>

	<?php comment_form(); ?>

</div><!-- #comments -->