1. Morphology In American English, a number of irregular verbs have become regularised, while remaining irregular in British English: a)In many instances, it is only the voicing of the past tense morpheme -(e)d which has been changed to regularise the verb:

Restriction of Meaning Restriction of meaning means that a word of wide meaning acquires a narrower, specialised sense which is applicable to only one of the objects it had previously denoted

a. Extension of meaning b. Restriction of meaning c. Degeneration of meaning d. Elevation of meaning

（1) A word once reserved for female persons in high places is generalised to refer to people of all levels in a society:

Collocative meaning consists of the associations a word acquires on account of the meanings of words which tend to occur in its environment

浙江大学远程教育学院：《药物分析》课程教学资源（参考资料）专业英语词汇 V

浙江大学远程教育学院：《药物分析》课程教学资源（参考资料）专业英语词汇 U

浙江大学远程教育学院：《药物分析》课程教学资源（参考资料）专业英语词汇 T

浙江大学远程教育学院：《药物分析》课程教学资源（参考资料）专业英语词汇 S

浙江大学远程教育学院：《药物分析》课程教学资源（参考资料）专业英语词汇 R