试比较下面两句: 1. He knows better than others. 2. He knows better than to do such a thing. 这两句里面都有“know better”,乍一看。外形相同,其实,两者形同意异,句意迥然不同。句1的“know better”只是一个自由短语词组,其后跟连词“than”组成比较结构,尽可以从其组成部分的字面意义来判定其释义:“他懂得比别人多。”句2的“know better+than+不定式”意思是:“很懂得;很明白(而不至于 Try to compare the following two sentences: 1. He knows better than others. 2. He knows better than to do such a thing. There are “know better” in both sentences. The appearance is the same. In fact, the two agree and the sentence is different. The sentence “know better” of sentence 1 is only a free phrase phrase, followed by a comparative structure with the conjunction “than,” and can be judged from the literal meaning of its constituent parts: “He knows more than others.” “Better+than+ infinitive” means: "I understand very well;