Sentence 1: I am starting my son in preschool in September. 
 Sentence 3: He has been with me since he was born 
 Sentence 4:  I am only starting with half a day 
 Sentence 5:  I hope he adjusts well 
 Option 1: I am excited he will be gone the entire day. 
 Option 2: I am a little nervous for him to go.