Put in at, on, in, for of no preposit 1are you free friday evening? 2con you come round to my place nine o'clock tomorrow? 3it's my birhday thvee days? 4we're going to colifornia. how long three 5we haven't got time to go shopping - the shops close five minutes? 6what are you going next tuesday? 7can i talk to you five minutes?