Although he is only four years old,but he can speak English well.此句错在哪?

Although he is only four years old,but he can speak English well.此句错在哪?
Although he is only four years old,but he can speak English well.此句错在哪?

Although he is only four years old,but he can speak English well.此句错在哪?
去掉but（也可以去掉although）
这两个词在一句话中只能出现一个（就像because和so一样）

Although and but can't be used in one sentence, so one of them should be deleted
he is only four years old,but he can speak English well
Although he is only four years old, he can speak English well

Although 和 but 都有转折意思，不用两个一齐用的，删掉其中一个就对了

although but不能连用。用一个就行了