I am reading uses of infinitive from a grammar book and two sentences are written in it, that are
- He started weeping seeing his father. (x) And
- He started weeping to see his father. (✓)
My concern is this if i say a sentence
- He started to weep seeing his father. Or
- He started to weep to see his father.
My concern is if 3rd and 4th having correct use of infinitive 'to', if not then what is the rule to make it grammatically correct sentence ?