- Since the attractive forces of the sun and moon act continuously on the ocean water, the tides are not free to move indepently as a seismic sea wave does.
- The forest will act as a defense against desert dust.
- Legislatures often act in a negatory manner.
- This dreadful murder is surely the act of a madman.
- He made a resolution never to repeat the act.
- We must ensure continuity of fuel supplies.