The grammatical differences between daily British English and American English are mainly in terms of the usage of
prepositions, auxiliary verbs, articles, pronouns, adjectives and adverbs, and tense and subjunctive mood. These
differences exert influence on English learning and interpersonal communication. This paper tries to illustrate the
differences of grammar between British and American daily English based on the authors’ teaching experience and
learning experience in the UK. By comparison, English learners would understand more about the differences and be
more effective while communicating with the people from the US and the UK.