1. Click the green button to start your work. 2. Click to highlight the prepostions in the sentences. 3. Click the green when finished! **REVIEW** Prepositions are linking words in a sentence. We use prepositions to explain where things are in time or space. Prepositions tell us where something is (for example, beside, under, on, against, beneath or over) or when something is happening (for example: until, during, after, before or more specifically 'on Christmas Day', 'at twelve o'clock' or 'in August').