SN4 ""

No	Pattern	Freq
1	[pron] must be [noun]	443
2	[pers pn] must be [noun]	246
3	there must be [noun]	184
4	[ex0] must be [noun]	184
5	there must be [noun]	184
6	it must be [noun]	147
7	it must be [noun]	147
8	[noun] must be [noun]	123
9	[noun sg] must be [noun]	69
10	you must be [noun]	52
11	you must be [noun]	52
12	[adj] must be [noun]	47
13	[noun pl] must be [noun]	41
14	[det] must be [noun]	40
15	they must be [noun]	25
16	they must be [noun]	22
17	this must be [noun]	20
18	this must be [noun]	20
19	that must be [noun]	13
20	that must be [noun]	13
21	[adv] must be [noun]	12
22	[adv] must be [noun]	12
23	[noun prp] must be [noun]	10
24	[verb] must be [noun]	9
25	we must be [noun]	8
26	we must be [noun]	8
27	he must be [noun]	7
28	[conj] must be [noun]	7
29	he must be [noun]	7
30	[Wh pn] must be [noun]	6