| 单词 | 选修 |
| 释义 | 〔elect〕elect an art course.See Synonyms at choose 选修艺术课 参见 choose〔can〕since it requires the pupil to distinguish explicitly between what is possible and what is allowed,a difference not always apparent to younger children.And even in later life,observance of the distinction is often advisable in the interests of clarity.Thus, the sentenceStudents can take no more than three courses allows the possibility that a student who is unusually capable may take more, whereasStudents may take no more than three courses does not. · The use ofcan to express permission is better tolerated in negative questions, as inCan't I have the car tonight? probably because the alternative contractionmayn't is felt to be awkward. 由于这要求学生清楚地区分可能的和得到许可的两者之间的差异，而这对小孩子们常常是不太明显的。并且在其今后的生活中，为明确起见，体会这种差异常常是很可取的。因此，句子学生们可以选修不超过三门的课程 给能力超常的学生学更多的课程提供了可能性， 然而学生们只能选修不超过三门的课程 则不能提供这种可能性。 can 的用法更可用于否定疑问句中表示许可， 如 我今晚不能使用这车吗？ ， 或许是由于可替代的缩写mayn't 感觉起来有些笨拙的缘故 〔elective〕An optional academic course or subject.选修的科目：选修课程或课题 |
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