✔ 最佳答案
When his father, who did not approve of dancing, learned that his son had been attending dances, he made Martin apologize in front of the entire church congregation.
我想問問1)when his father, who <----點解要加(,)
2)dancing, learned <----點解要加(,)
3)dances, he made 點解唔係(.)
［說明］
who did not approve of dancing前後加上逗號，表示這個形容詞子句（關係子句）是非限定的。因為他的爸爸只有一位，不能加以限定是那一位。
when his father learned that his son had been attending dances是副詞子句，放到主要子句之前時，應加上逗號，表示占了主要子句的位置。如果這個附屬子句（副詞子句）移到主要子句後面去，就不必加逗號了。
2010-03-02 18:31:49 補充：
He made Martin apologize...是主要子句,he是主詞
when his father learned...是副詞子句,修飾主要子句的述部
who did not approve of dancing是形容詞子句,修飾前面的副詞子句的主詞father
that his son had been attending dances是名詞子句當副詞子句動詞learned的受詞
