1. Relative clauses are “embedded” grammatical structures, contained inside other grammatical structures. 2. Relative clauses play a central role in English discourse. 3. Relative clause knowledge is ...

When do I put a comma before but and when do I not have to put a comma before but? What about a comma after but? Songul Kosker and Kazim Cakmak from Turkey write: Hi! Your web site is great. We're ...

The present perfect with 'for' and 'since' Comparatives and superlatives The present perfect with ‘just’, ‘already’ and ‘yet’ Defining relative clauses 'May', 'might' and 'could' 'Used to' Subject ...