Oxford Collocations Dictionary Online (1 year's access)
A corpus-based dictionary which shows the most frequently used word combinations in British and American English
The Oxford Collocations Dictionary shows which words work together. It helps students express their ideas naturally and convincingly and is particularly useful for academic and report writing.
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Oxford Learner's Quick Reference Grammar - iOS app
Pocket-sized grammar to revise and check grammar rules
Language Level: Intermediate to Advanced (B1-C2)
Quick, clear and easy-to-understand explanations of the grammar.