“Watch” 的过去式是 “watched”。“Watch” 作为动词，主要有以下含义：1. 观看：指观察、注视某人或某物，尤指观看电视、电影、比赛等。2. 留意：指关注、注意某人或某事。3. 守护：指看守、守护某人或某物。

　　“Watch” 的用法：

　　1. 观看：I like to watch movies on weekends. 我喜欢在周末看电影。

　　2. 留意：You should watch your step on the icy road. 在结冰的路上，你要留意脚下。

　　3. 守护：The dog watched over the baby while the parents were out. 父母外出时，狗看着宝宝。

　　以下是一些包含 “watch” 的例句：

　　1. I watched a great movie last night. 昨晚我看了一部很棒的电影。

　　2. She watched carefully as the magician performed his tricks. 她全神贯注地观看魔术师表演魔术。

　　3. We should watch our spending to save money for our vacation. 我们应该留意开支以节省假期的费用。

　　4. The cat watched the bird sitting on the windowsill. 猫看着鸟坐在窗台上。

　　5. The soldier watched the horizon for any signs of enemy movement. 士兵注视着地平线，寻找敌人行动的迹象。