##### 系动词
- 系动词 `Linking Verbs`
- 系动词用于连接主语和主语的表语补语, 它不传达动作, 而是表示状态, 特征或关系, 在句子中起到将主语与描述性信息联系起来的作用
- 分类
- be (是、在、存在)
- They are not my classmates. (他们不是我的同学)
- seem (似乎)
- He seems happy. (他似乎很开心)
- become (变成)
- She became a doctor. (她变成了医生)
- feel (感觉)
- They don‘t feel tired. (他们感觉不累)
- look (看起来)
- The cake looks delicious. (这个蛋糕看起来很美味)
- taste (尝起来)
- The soup tastes spicy. (这汤尝起来很辣)
- smell (闻起来)
- The flowers smell lovely. (花儿闻起来很可爱)
- sound (听起来)
- The music sounds soothing. (音乐听起来很舒缓)
- appear (显得、出现)
- The sun appeared in the sky. (太阳出现在天空中)
- remain (保持、仍然是)
- The question remains unanswered. (这个问题仍然没有答案)
- stay (保持,停留)
- She stayed calm. (她保持冷静)
- turn (变得)
- The milk turned sour. (牛奶酸了)
- prove (证明)
- The experiment proved successful. (实验证明是成功的)