SN4 ""

No	Pattern	Freq
1	must be [verb] the [noun]	90
2	must be [verb] the [noun]	90
3	must be [verb] the [noun sg]	71
4	must be [vb pp] the [noun]	44
5	must be [to-vb] the [noun]	27
6	must be [v-ing] the [noun]	19
7	must be [verb] the [noun pl]	17
8	must be give the [noun]	10
9	must be given the [noun]	10
10	must be set the [noun]	7
11	must be set the [noun]	7
12	must be [verb] the cost	6
13	must be add the [noun]	6
14	must be added the [noun]	6
15	must be shown the [noun]	5
16	must be tell the [noun]	5
17	must be show the [noun]	5