SN4 ""

No	Pattern	Freq
1	[pron] must be a [adj]	233
2	[ex0] must be a [adj]	122
3	there must be a [adj]	122
4	there must be a [adj]	122
5	[noun] must be a [adj]	99
6	[pers pn] must be a [adj]	96
7	[noun sg] must be a [adj]	76
8	it must be a [adj]	58
9	it must be a [adj]	58
10	[adj] must be a [adj]	34
11	[det] must be a [adj]	32
12	this must be a [adj]	19
13	this must be a [adj]	19
14	you must be a [adj]	15
15	[noun pl] must be a [adj]	15
16	you must be a [adj]	15
17	[Wh det] must be a [adj]	12
18	he must be a [adj]	12
19	that must be a [adj]	11
20	he must be a [adj]	11
21	that must be a [adj]	11
22	what must be a [adj]	9
23	what must be a [adj]	9
24	[noun prp] must be a [adj]	7
25	[adv] must be a [adj]	7
26	[adv] must be a [adj]	6
27	she must be a [adj]	5
28	[verb] must be a [adj]	5
29	she must be a [adj]	5
30	must [verb] be a [adj]	188