SN4 ""

No	Pattern	Freq
1	[noun] must be [prep] [det]	21
2	[pron] must be [prep] [det]	17
3	[pers pn] must be [prep] [det]	15
4	[noun sg] must be [prep] [det]	15
5	it must be [prep] [det]	6
6	it must be [prep] [det]	6
7	they must be [prep] [det]	5
8	[noun pl] must be [prep] [det]	5
9	they must be [prep] [det]	5
10	must be [verb] [prep] [det]	417
11	must be [vb pp] [prep] [det]	404
12	must be [adj] [prep] [det]	135
13	must be [adj] [prep] [det]	123
14	must be make [prep] [det]	26
15	must be [noun] [prep] [det]	26
16	must be made [prep] [det]	26
17	must be unique [prep] [det]	14
18	must be unique [prep] [det]	14
19	must be [v-ing] [prep] [det]	13
20	must be [noun pl] [prep] [det]	13
21	must be [noun sg] [prep] [det]	13
22	must be given [prep] [det]	11
23	must be use [prep] [det]	11
24	must be used [prep] [det]	11
25	must be give [prep] [det]	11
26	must be aware [prep] [det]	10
27	must be avoid [prep] [det]	10
28	must be aware [prep] [det]	10
29	must be avoided [prep] [det]	10
30	must be serve [prep] [det]	8