n.
1) to ask (for) ~ (to ask ~ in return)
2) to gain ~ by (we will gain ~ by ignoring the regulations)
3) ~ about (we know ~ about it)
4) ~ to (they are ~ to us)
5) ~ to + inf. (we have ~ to lose)
6) ( misc. ) to leave ~ to chance; to make ~ of being awarded an honor; we expect ~ of him; you can expect ~ from them; good for ~; ~ doing ('definitely not'); we have ~ that we can discuss