much

The new chair is comfortable.

新しい椅子は楽です

The new chair is much more comfortable.

新しい椅子はずっと楽です

The new chair is much more comfortable than the old one.

新しい椅子は以前の椅子よりずっと楽です

For me, the new chair is much more comfortable than the old one.

新しい椅子は私には以前の椅子よりずっと楽です

For me, the new chair is much more comfortable than the old one even when I sit for a long time.

新しい椅子は私には長く座っていても以前の椅子よりずっと楽です