And most black children came from poor, ill-educated families where English, the main language of instruction, was not their mother tongue.(而且黑人孩子大都來自文化程度很低的貧困家庭，他們的母語不是教學中所使用的英語。)

We did not even have parents whose mother tongue was English!(我們甚至都沒有說英語為母語的父母！)

Hoping to discover what language a child would speak if he heard no mother tongue, he told the nurses to keep silent.(他希望發現一個沒有聽到母語的孩子會說什么語言，他讓護士們保持沉默。)

English has become a truly international language with more speakers of English as a second language than as a first or mother tongue.(英語已經成為真正的國際語言，因為把英語作為第二語言的人數已經超過以英語為第一語言或母語的人數。)

British readers have access to an unprecedented range of news and ideas from Europe in their mother tongue.(英國讀者單靠母語就可以接觸到歐洲各類新聞和思想，范圍之廣，史無前例。)

While learning a second language, students should also enhance their awareness of the importance of mastering their mother tongue.(在學習第二語言的同時，學生也應該更加重視掌握母語的重要性。)

English is her mother tongue.(英語是她的母語。)

Maybe this is already her mother tongue.(也許這先前就是她的母語。)

Its disloyal children are ditching their mother tongue for English and French.(它不忠的孩子們將母語棄如敝屣，而開始學說英語和法語。)

Media is a form of language, and we always favor our mother tongue.(媒體是一種語言形式，而我們永遠偏愛自己的母語。)