In the 20th century, with Chomsky and Krashen as the representatives, some American linguists assumed that second language acquisition was fundamentally similar to first language acquisition.

• 摘要20世纪以乔姆斯基和克拉申为代表的美国语言学家认为第二语言的习得过程与第一语言的习得过程是一样的，结果语法教学不再被教师纳入课堂教学的一部分。