SN4 ""

No	Pattern	Freq
1	[noun] must be [adj]	1504
2	[noun sg] must be [adj]	942
3	[noun pl] must be [adj]	462
4	[noun] must be able	148
5	[noun prp] must be [adj]	68
6	[noun] must be aware	54
7	[noun] must be satisfied	53
8	[noun] must be available	48
9	[noun] must be capable	42
10	[noun] must be free	30
11	[noun] must be prepared	29
12	system must be [adj]	27
13	system must be [adj]	25
14	[noun] must be clear	24
15	[noun] must be good	24
16	[n mass] must be [adj]	23
17	[noun] must be unique	22
18	[noun] must be present	20
19	[noun] must be due	18
20	[noun] must be open	15
21	[noun] must be reasonable	15
22	condition must be [adj]	14
23	conditions must be [adj]	13
24	[noun] must be careful	13
25	[noun] must be ready	12
26	people must be [adj]	12
27	people must be [adj]	12
28	manager must be [adj]	12
29	[noun] must be equal	11
30	court must be [adj]	11