SN4 ""

No	Pattern	Freq
1	[verb] must be	366
2	[vb pp] must be	174
3	[vb base] must be	60
4	[to-vb] must be	39
5	[v-ing] must be	33
6	[vb -s] must be	30
7	[vb past] must be	27
8	used must be	17
9	use must be	17
10	say must be	16
11	think must be	13
12	care must be	9
13	care must be	9
14	know must be	8
15	make must be	7
16	give must be	7
17	think must be	6
18	do must be	6
19	given must be	6
20	made must be	5
21	says must be	5
22	describe must be	5
23	knew must be	5
24	work must be	5