Everyone knows that our products are of superior quality to those from other countries.
I agree that yours are of better quality.
请高手分析一下句子结构，尤其是be动词后为什么要加 of 呢？
如果把 of 去掉可以吗？
Everyone(主语） knows（谓语） that our products are of superior quality to those from other countries（宾语从句）.I（主语） agree（谓语） that yours are of better quality（宾语从句）.结构很简单的，你说的of quality是一个句型，of+名词=形容词比如of help=helpful要指出的是quality即是名词又是形容词,比如quality goods：高品质的货物
