before 后接从句还是分词？

Question

NCE3 21课有一句：

How many unsuccessful attempts did he make before becoming Champion of all England?

他经历了多少次尝试后才成为全英国的冠军？

before 后接的现在分词作什么成分？ 宾语？还是状语？
可改写成.... before he became .....吗？

Answer 1

before 后接的是动名词而不是现在分词,这里before是介词,动名词作时间状语,可以改写成.... before he became .....,这里before是连词.
句意为:在他成为全英国的冠军前他经历了多少次失败的尝试?

Answer 2

可以的，becoming是状语

Answer 3

分词后就是要跟分词的或者短语 不可以跟句子

Answer 4

before becoming Champion of all England整个作时间状语。
before后面可以接分词也可以句子。