英语SAT语法题(Identifying Sentence Errors)

英语SAT语法题(Identifying Sentence Errors)
题目是这样：Air pollution caused by industrial fumes has been studied for years, but only recently has the harmful effects of noise pollution became known.我的英语老师说是has用错了.应该用have.结果就下课了.这里是不是倒装问题?还请高手指教下.

影风芝 1年前已收到1个回答举报

猫小侠幼苗

共回答了15个问题采纳率：93.3% 举报

是的,错在后半句,给你回归正常语序：The harmful effects of noise pollution have became known. 主语是effects所以后面用have.
满意请采纳~

1年前

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