What is a dangling modifier? When should you use `that', and when should you use `which'? When is a sentence not a sentence? Find the answers to these and many other questions about language and its use in the Handbook for Writers and Editors. It provides a comprehensive coverage of the principles of grammar and punctuation, and the practice of common usage. Margaret McKenzie teaches in the Diploma of Arts (Professional Writing and Editing) at Holmesglen Institute of TAFE and CAE in Melbourne.