a) The last time we went in the summer (place). It was so interesting! I loved this trip! (Describing what are you doing).
b) The last time we went in the winter (place). It was so interesting! I loved this trip! (Describing what are you doing). There was a lot of snow, etc.
с) I went to the sea (when?). We are well traveled and there they vremya.My with (whom). We swam, played, build sand towers, etc. ..