Placing post thumbnail next to excerpt

Hey there,

I’m using a Twenty Eleven child theme and I’m kind of a CSS/PHP amateur.

I want thumbnail images to appear next to the whole post (header/title, entry and footer). At the moment it is next to the text content, but below the header and above the footer.

I have placed a thumbnail code just under the entry-content class:

<div class=”entry-content”>
<?php the_post_thumbnail( ‘thumbnail-feature’ ); ?>

Other than that, the content.php looks just like the original one.

Moving the thumbnail code alters the location, but I can’t align it left of the whole post.

At the moment it looks like this.

I’d really appreciate some help. Thanks!