64 Unit 8 19 Sometimes it can be di ffi cult to know whether to use  a  or  in , so we list below common expressions using these two prepositions: A  or  in ? a casa a scuola a letto a lezione (at) home at/to school in/to bed in class/to (one’s) class a tavola a destra / a sinistra a nord / a sud / a est / a ovest a colazione / a pranzo / a cena a mezzogiorno / a mezzanotte a 10 / 11 / 12  [etc.]  anni a metà all’ombra / al sole al bar al ristorante alla stazione to the table [i.e. come and sit down]/at table (on/to the) right/left (in/to the) north/south/east/west at/for breakfast/lunch/dinner, supper or tea at midday/midnight at ten/eleven/twelve [etc.] (years of age) in the middle/mid- in the shade/in the sun in the bar at/to the restaurant at/in/to the station in pizzeria in discoteca in città in centro in chiesa in mensa in camera in bagno in classe in palestra in caserma in prigione in u ffi cio in piscina in/to/at a/the pizzeria/pizza parlour in/to the disco in/to town in/to the city centre in/to church in/to the canteen in/to the bedroom in/to the bathroom in/to the classroom in/to the gym in/to the barracks in/to prison in/to the o ffi ce at/to the swimming bath