Practical English Usage: app for Android

Deals with spoken and written grammar, vocabulary, spelling, pronunciation, and differences between formal and informal language Contains over 600 indexed entries covering all the important problems for learners of English Offers clear simple explanations with corpus-based examples Includes notes on background topics such as letters and emails, politeness, standardisation and dialect grammar, the meaning of 'correctness', differences between spoken and writtenEnglish, and changes in English Covers differences between British and American English