正确的写法和答案是：The cat likes fish，(as) is known to us.2. 解释：1）非限制性定语从句中，关系代词as代替整个主句the cat likes fish，做该定语从句的主语(从句)。即完整的定语从句为：(That the cat likes fish) is known to us.猫喜欢鱼（这种情况）是我们所知道的。2）整个句子可...
fish用作可数名词指“鱼的条数”时单数和复数形式相同（two fish两条鱼）,指“鱼的种类”时复数形式才为fishes（two fishes两种鱼）；fish用作不可数名词时无复数形式,应作“鱼肉”解（Help yourself to some fish.随便吃些鱼.）这里的fish指“鱼肉”，是不可数名词；所以不加-es ...
