Example of <a> tag

<!DOCTYPE html>
<html>
<head>
</head>
<body>
To Learn HTML 5, <a href= "http://www.myhtml5tutorials.com/"> Click Here </a>
</body>
</html>

Example of <p> tag

<!DOCTYPE html>
<html>
<head>
</head>
<body>
<p> Our site offers a lot of HTML5 learning from absolutely beginning to advanced level.If you want to make a website with HTML,this site will completely guide you a lot. </p>
</body>
</html>

Example of <div> tag

<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div style="color:red">
<h2> HTML </h2>
<p> HTML is the most common language for making web pages.
</div>
<div style="color:blue">
<h2> CSS </h2>
<p> CSS is used to style the HTML document.
</div>
</body>
</html>

Example of <b>, <em>, <sub> tag

<!DOCTYPE html>
<html>
<head>
</head>
<body>
<p>
<b>This is bold texts.</b> <br>
<em>This is emphasized texts.</em> <br>
The chemical formula of water is H<sub>2</sub>O. <br>
</p>
</body>
</html>