1.他是我们的数学老师。
[误] He is our mathematical teacher.
[正] He is our mathematics teacher.
[析] 表示“一名数学老师”,应该说 a mathematics teacher, mathematical的意思是“数学上的; 精确的”。
2.数学是她最差的科目。
[误] Mathematics are her weakest subject.
[正] Mathematics is her weakest subject.
[析] mathematics指一门科目时,应该视为单数,谓语动词也用单数形式。
3.我们学数学、化学、物理等。
[误] We study Mathematics,Chemistry,Physics, etc.
[正] We study mathematics, chemistry, physics, etc.
[析] 学科名词的第一英文字母一般不大写; 但用作教科书的名称时须大写。