Tree diagrams of embedded clauses
Si
ft
NT V--
vf A-
V
?
V
MP
Ju
H
The boy whom we met yesterday is your best friend
0-
V
V),
hi
We met the boy who is your best friend
V?
C;
			&l (en.	
				V'
	a	b		
V?
Jane is happier than her sister is.