如何使用 "could" 造句

1. We could play computer games .
我们可以玩电脑游戏。
2. You could also try sledding .
你也可以试试雪橇。
3. Solar power could replace them .
太阳能发电可以取代他们。
4. They could avoid foreign entanglements .
他们可以避免外国瓜葛。
5. Perhaps kosovo could join them .
也许科索沃可以加入它们。