The changes identified by David Graddol all present clear and major challenges to the UK’s providers of English language teaching to people of other countries and to broader education business sectors.
断句：
① The changes identified by David Graddol all present clear and major challenges
② to the UK’s providers of English language teaching to people of other countries
③ and to broader education business sectors.
各部分结构：
① 主语(The changes)+定语( identified by David Graddol)+谓语( all present )+宾语(clear and major challenges)
② 状语1：to the UK’s providers +定语1(of English language teaching)+定语2( to people of other countries)
③ 并列状语2：and to broader education business sectors.
参考译文：大卫·加多菲尔所发现的变化为教授外国人英语的英国机构和更广泛的教育行业都提出了清晰而主要的挑战。
