SN4 ""

No	Pattern	Freq
1	[conj] you must be [adj]	54
2	[coord] you must be [adj]	35
3	[noun] you must be [adj]	30
4	[verb] you must be [adj]	24
5	[noun sg] you must be [adj]	21
6	and you must be [adj]	18
7	and you must be [adj]	18
8	[adv] you must be [adj]	17
9	but you must be [adj]	17
10	[adv] you must be [adj]	17
11	but you must be [adj]	17
12	[vb base] you must be [adj]	10
13	that you must be [adj]	10
14	that you must be [adj]	10
15	[that] you must be [adj]	10
16	then you must be [adj]	9
17	[subord] you must be [adj]	9
18	then you must be [adj]	9
19	[noun pl] you must be [adj]	8
20	[to-vb] you must be [adj]	7
21	so you must be [adj]	7
22	so you must be [adj]	7
23	[adj] you must be [adj]	5
24	you must [adv] be [adj]	32
25	you must not be [adj]	17
26	you must [not/n't] be [adj]	17
27	you must [adv] be [adj]	15
28	you must not be [adj]	9
29	you must n't be [adj]	8
30	you must always be [adj]	6