the excerpt

Hi Im using the excerpt for post but when I click on the read more link it does not show me all post paragraph and it show me only the paragraph excerpted and this the code ine index.php
<?php if ( have_posts() ) : ?>

<?php while ( have_posts() ) : the_post(); ?>
<?php get_template_part( ‘content’, get_post_format() ); ?>
<h2> “> <?php the_title(); ?> </h2>
<?php the_excerpt(); ?>
<?php endwhile; ?>
<?php else : ?>
<?php get_template_part( ‘content’, ‘none’ ); ?>
<?php endif; ?>
and this is the code in function.php file
function new_excerpt_more( $more ) {
return ‘ ‘ . __(‘Read More’, ‘your-text-domain’) . ‘‘;
}
add_filter( ‘excerpt_more’, ‘new_excerpt_more’ );