$\text{*S + V + such (+ a/an) + Adjective + Noun + that + S + V}$
$\text{1. It's such a difficult lesson that nobody can understand it.}$
$\text{2. He's such a very nice boy that we all like him.}$
$\text{3. It was such a cold weather that we couldn't go out.}$
$\text{4. It was such a dark room that I couldn't see anything.}$
$\text{5. It is such a very simple song that all of us can sing it.}$