1. For one off actions completed in the past
2. IR - to go
   1. fui - I went
   2. fuiste - you went (informal)
   3. fue - he went, she went , you went (formal)
   4. fuimos - we went
   5. fueron - they went, you went (plural)
3. SER - to be
   1. fui - I was
   2. fuiste - you were (informal)
   3. fue - he was she was , you were (formal)
   4. fuimos - we were
   5. fueron - they were, you were (plural)