smell
1.下面三句意思相同：
- He used to smell a dish before he tasted it.
- He used to smell at a dish before he tasted it.
- He used to smell of a dish before he tasted it.
第三句似乎只用在美国。
2.The meat smells good和The flowers smell sweet等句子里该用形容词，不该用副词。It smells disgusting和It smells disgustingly都可以说。第一句里的smell作“发出…的气味”解，那disgusting是表语，第二句里的smell作“发出恶劣的气味”解，那disgustingly是副词。第一句等于It has a disgusting smell，第二句等于It stinks so as to disgust one。
