SN4 ""

No	Pattern	Freq
1	should be [vb pp] to [art]	777
2	should be [vb pp] to [art]	777
3	should be [vb pp] to the	649
4	should be [vb pp] to the	649
5	should be [vb pp] to [noun]	337
6	should be [vb pp] to [adj]	293
7	should be [vb pp] to [noun prp]	141
8	should be [vb pp] to [det]	131
9	should be [vb pp] to a	126
10	should be [vb pp] to [adj]	109
11	should be [vb pp] to a	101
12	should be [vb pp] to [pron]	97
13	should be [vb pp] to [noun sg]	93
14	should be [vb pp] to [noun pl]	90
15	should be [vb pp] to be	73
16	should be [vb pp] to [be]	73
17	should be [vb pp] to be	72
18	should be [vb pp] to [be]	72
19	should be [vb pp] to [verb]	54
20	should be [vb pp] to [v-ing]	53
21	should be [vb pp] to [pers pn]	50
22	should be [vb pp] to [num]	46
23	should be [vb pp] to [adv]	39
24	should be [vb pp] to [pos pn]	38
25	should be [vb pp] to [adv]	36
26	should be [vb pp] to [prep]	29
27	should be [vb pp] to [prep]	29
28	should be [vb pp] to those	26
29	should be [vb pp] to those	26
30	should be [vb pp] to all	25