49.1 Main/Auxiliary
- had (Auxiliary)
- called (Main)
- studying (Main)
- help (Main)
- do (Main)
- listen (Main)
- plays (Main)
- sold (Main)
- gave (Main)
- buying (Main)
- works (Main)
49.2 Filled Gaps
- are
- isn't
- have
- didn't
- could
- must
49.3 Word Search
Transitive: GIVE, FIND, CARRY, BUILD, GROW, PAINT
Intransitive: LAUGH, SWIM, RUN, FLY, EAT, SLEEP