SN4 ""

No	Pattern	Freq
31	[Wh det] must be [adj]	50
32	[coord] must be [adj]	45
33	which must be [adj]	43
34	which must be [adj]	43
35	[adv] must be [adj]	37
36	[adv] must be [adj]	36
37	and must be [adj]	32
38	and must be [adj]	32
39	system must be [adj]	27
40	that must be [adj]	27
41	[vb pp] must be [adj]	27
42	that must be [adj]	27
43	system must be [adj]	25
44	[adj] must be [adj]	23
45	this must be [adj]	23
46	this must be [adj]	23
47	[n mass] must be [adj]	23
48	[that] must be [adj]	19
49	that must be [adj]	19
50	that must be [adj]	19
51	[Wh pn] must be [adj]	18
52	who must be [adj]	16
53	who must be [adj]	16
54	[vb base] must be [adj]	15
55	condition must be [adj]	14
56	conditions must be [adj]	13
57	people must be [adj]	12
58	people must be [adj]	12
59	manager must be [adj]	12
60	court must be [adj]	11