This is Sam. I go to school with (Sam). (Sam) is (I) best friend. I like (Sam) very much.
This is Sam. I go to school with HIM. HE is MY best friend. I like HIM very much
(My friends and I) are going to the park. Do you want to come with (my friends and I)
WE are going to the park. Do you want to come with US?
(My mom) is looking at (I)
SHE is looking at ME