SN4 ""

No	Pattern	Freq
1	[noun] could be [vb pp] on the	78
2	[noun sg] could be [vb pp] on the	48
3	[noun pl] could be [vb pp] on the	23
4	[pron] could be [vb pp] on the	13
5	[conj] could be [vb pp] on the	9
6	[Wh det] could be [vb pp] on the	8
7	[adj] could be [vb pp] on the	6
8	which could be [vb pp] on the	6
9	[noun prp] could be [vb pp] on the	6
10	which could be [vb pp] on the	6
11	[det] could be [vb pp] on the	5
12	[pers pn] could be [vb pp] on the	5
13	could [adv] be [vb pp] on the	42
14	could [adv] be [vb pp] on the	23
15	could [not/n't] be [vb pp] on the	19
16	could not be [vb pp] on the	19
17	could not be [vb pp] on the	17
18	could also be [vb pp] on the	7
19	could also be [vb pp] on the	7
20	could be [vb pp] [verb] on the	13
21	could be [vb pp] [adv] on the	12
22	could be [vb pp] [adv] on the	9
23	could be [vb pp] [to-vb] on the	7
24	could be [vb pp] [v-ing] on the	5
25	could be [vb pp] on the [noun]	81
26	could be [vb pp] on the [noun sg]	53
27	could be [vb pp] on the [adj]	27
28	could be [vb pp] on the [noun pl]	22
29	could be [vb pp] on the [adj]	22
30	could be [vb pp] on the basis	11