语言学家

I used to be a linguist till I become a writer.

过去我是个语言学家, 了作家。

He used to be a linguist till he turns writer.

他过去是个语言学家, 了作家。

"This well-known linguistic learned tribal languages in the field, not from books in the library."

"这位著名的语言学家是在实地学会部落语言,而不是在图书馆的书籍上学会的。"

Historical linguists have to identify and classify families of related languages in a genealogical family tree, and to reconstruct the protolanguage.

历史语言学家们通过对各语系中相关语言进行，画出家族谱系图，从而重新构建语系的原始语。