Over 500 photocopiable pages on requests, offers, making arrangements, complimenting and about every other conceivable function, at just a penny a page. Details here and buy a copy here.

Also ties that language in with things which are more likely to be on your syllabus like:

• various tenses
• small talk
• business
• EFL exams
• travel and transport
• word formation
• collocations
• time expressions
• superlative
• social studies
• irregular plurals
• countable and uncountable
• news/ current affairs
• writing
• verb patterns
• saying numbers in English
• giving presentations
• varieties of English
• entertaining

Buying a copy not only gives you a lifetime supply of practice for vital communicative functions like opinions and filling silence, but will also help me improve TEFLtastic while keeping it free and ad free. Thanks!