A man works on a roof with a nail gun.
A man happily works on a roof
man working on a roof with a nail gun does not imply the man is happily doing it
exists e1 x1 x2 x3 x4.(on(e1,x2) & with(x2,x3) & n_gun(x3) & of(x3,x4) & n_nail(x4) & n_roof(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1))
exists e1 s1 x1 x2.(a_happily(s1) & Manner(e1,s1) & on(e1,x2) & n_roof(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1))