Question

みー

青のマーカーで引いてあるところなんですけど、Before he became President のbecameは現在形じゃダメなんですか？
また、Beforeは時や条件を表す副詞節ですか？

よろしくお願いします🙏

1 英文を読んで、以下の問いに答えなさい。
(1→各3点 2、3→各7点 4→4点)
Before he became
Nelson Mandela was the president of South Africa.
president, South Africa had a system of apartheid. Under the apartheid system,
white people had all of the power. Black people had to live in separate areaS.
1
They could not vote, get good jobs, or go to good schools.

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