SN4 ""

No	Pattern	Freq
1	[pers pn] must be [adj]	1492
2	it must be [adj]	473
3	you must be [adj]	335
4	we must be [adj]	203
5	they must be [adj]	153
6	he must be [adj]	140
7	[pers pn] must be able	109
8	i must be [adj]	106
9	[pers pn] must be careful	100
10	[pers pn] must be prepared	77
11	she must be [adj]	67
12	[pers pn] must be mad	58
13	[pers pn] must be aware	43
14	[pers pn] must be possible	36
15	[pers pn] must be sure	29
16	[pers pn] must be clear	27
17	[pers pn] must be good	23
18	[pers pn] must be ready	20
19	[pers pn] must be right	19
20	[pers pn] must be true	18
21	[pers pn] must be nice	14
22	[pers pn] must be willing	14
23	[pers pn] must be honest	14
24	[pers pn] must be patient	14
25	[pers pn] must be dead	13
26	[pers pn] must be difficult	13
27	[pers pn] must be obvious	12
28	[pers pn] must be free	11
29	[pers pn] must be tired	11
30	[pers pn] must be satisfied	11