He works hard so as to succeed.

It is a marvel that he should say so.

The pianissimo section of the symphony was so delicate.

The handwriting on the note was so messy that it was unreadable.

Uhuh, I don't think so.

The fabric was so delicate that it felt thready.

She plays the piano so well.

So what if I made a mistake?

She is not so much a singer as a comedian.

What makes you so sad?