all，後面為啥不能加名詞

要看all指代的什麼。如果指代的時不可數名詞，那麼，謂語動詞用單數。如：All of the water there is polluted. All of the paper there runs out. 如果指代的時可數名詞（那一定是複數名詞），則謂語動詞用複數。 如：All of the books are worth reading