Question

一道英语语法题____the beginning of the 19th century did scientists

Answer 1

Not until ...did...表示“直到...”意思.not until 提前,倒装语序,表示强调.

本句话翻译：直到19世纪初,科学家们才知道所有的物体都是由原子构成的.

the beginning of the 19th century 是个时间名词.

本句话正常语序应该是：Scientists didn't know that all matter is made up of atoms until the beginning of the 19th century .

把the beginning of the 19th century 只是为了强调突出作用.

而 at the beginning of the 19th century 搭配确实不错,但只适用在作状语的情况下.由did一词可以看出the beginning of the 19th century 在这里做的不是状语,一次不能用at.