I am very tired so I can’t concentrate properly

7. I am very tired so I can’t concentrate properly.
If ___________________________________________________________
8.We don’t have a garden, so we don’t grow our own vegetables.
If ___________________________________________________________
9.He doesn’t give you good advice because he isn’t your true friend.
If ___________________________________________________________
10.We come late because the rain is so heavy.
If ___________________________________________________________
11.You don’t get better marks because you don’t study harder.
If _____________________________________________________________
12.She is very busy so she can’t go out tonight.
If _____________________________________________________________
13.I don’t know anything about her background, so I can’t tell you.
If ______________________________________________________________
14. I wasn’t hungry so I didn’t feel like eating.
If _____________________________________________________________
15. She’s so shy, that why she doesn’t have many friends.
If ______________________________________________________________