Rewriting the sentences: Nam doesn't work hard, so he won't pass the exam

1/ Rewriting the sentences;
a/ Nam doesn't work hard, so he won't pass the exam
- if...............................................................................................
- because nam..........................................................................................
b/ Let's go to the english club
- Tom suggested that they .........................................................................
c/ Ba ate a lot of food . he wans't very hungry
-though...............................................................................