比较从句可以省略宾语、谓语甚至整个从句，只要逻辑意思合理。 EG: Whereas I drink 2 quarts of milk a day, my friend drinks 3 [quarts}. I walk faster than Brian [walks}. I walk as fast now as [I walked} when I was younger.
为了不造成歧义，需要添加动词和情态动词，以保持逻辑含义鲜明。 EG: Visual eats more carrots than donuts. (donuts必须为宾语才能省略) Ambiguous: I like cheese more than Yvette. {Yvette could be subject or object.} Right: I like cheese more than Yvette DOES. (=than Yvette likes cheese) Right: I like cheese more than I DO Yvette. (= than I like Yvette) 总结：主语比较，新的主语+动词；介宾比较、宾语比较，直接放介宾和宾语即可。